Given the following C code and unoptimized assembly code, your task is to generate highly optimized x86-64 assembly code.
C Code:

```c
// Problem B

#include <stdio.h>
//~ #include <iostream>
//~ #include <vector>
#include <string.h>
//~ #include <cassert>
//~ #include <algorithm>
//~ #include <set>
//~ #include <map>
//~ #include <math.h>
//~ #include <queue>
//~ #include <stack>

#define MAXN 200100
#define pb push_back
#define mp make_pair

//~ using namespace std;

//~ typedef long long int ll;
//~ typedef pair<int, int> ii;

char a[MAXN];

int main() {
  scanf("%s", a); 
  int i;
  int n = (int)strlen(a);
  for (i=0; i<n; i++)
    if (a[i] == '?')
      a[i] = 'D';
  printf("%s", a);
  return 0;
}
```

Unoptimized Assembly Code:

```assembly
	.file	"temp.c"
	.text
	.globl	a
	.bss
	.align 32
	.type	a, @object
	.size	a, 200100
a:
	.zero	200100
	.section	.rodata
.LC0:
	.string	"%s"
	.text
	.globl	main
	.type	main, @function
main:
.LFB0:
	.cfi_startproc
	endbr64
	pushq	%rbp
	.cfi_def_cfa_offset 16
	.cfi_offset 6, -16
	movq	%rsp, %rbp
	.cfi_def_cfa_register 6
	subq	$16, %rsp
	leaq	a(%rip), %rax
	movq	%rax, %rsi
	leaq	.LC0(%rip), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	__isoc99_scanf@PLT
	leaq	a(%rip), %rax
	movq	%rax, %rdi
	call	strlen@PLT
	movl	%eax, -4(%rbp)
	movl	$0, -8(%rbp)
	jmp	.L2
.L4:
	movl	-8(%rbp), %eax
	cltq
	leaq	a(%rip), %rdx
	movzbl	(%rax,%rdx), %eax
	cmpb	$63, %al
	jne	.L3
	movl	-8(%rbp), %eax
	cltq
	leaq	a(%rip), %rdx
	movb	$68, (%rax,%rdx)
.L3:
	addl	$1, -8(%rbp)
.L2:
	movl	-8(%rbp), %eax
	cmpl	-4(%rbp), %eax
	jl	.L4
	leaq	a(%rip), %rax
	movq	%rax, %rsi
	leaq	.LC0(%rip), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	printf@PLT
	movl	$0, %eax
	leave
	.cfi_def_cfa 7, 8
	ret
	.cfi_endproc
.LFE0:
	.size	main, .-main
	.ident	"GCC: (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0"
	.section	.note.GNU-stack,"",@progbits
	.section	.note.gnu.property,"a"
	.align 8
	.long	1f - 0f
	.long	4f - 1f
	.long	5
0:
	.string	"GNU"
1:
	.align 8
	.long	0xc0000002
	.long	3f - 2f
2:
	.long	0x3
3:
	.align 8
4:
```

Only output the optimized assembly code. Do not include any other text. Do not write any comments in the assembly code. Wrap the assembly code in ```assembly``` tags.
user
	.file	"temp.c"
	.text
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"%s"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB35:
	.cfi_startproc
	endbr64
	pushq	%r12
	.cfi_def_cfa_offset 16
	.cfi_offset 12, -16
	leaq	a(%rip), %r12
	xorl	%eax, %eax
	pushq	%rbp
	.cfi_def_cfa_offset 24
	.cfi_offset 6, -24
	leaq	.LC0(%rip), %rbp
	movq	%r12, %rsi
	movq	%rbp, %rdi
	subq	$8, %rsp
	.cfi_def_cfa_offset 32
	call	__isoc99_scanf@PLT
	movq	%r12, %rdi
	call	strlen@PLT
	testq	%rax, %rax
	je	.L2
	subl	$1, %eax
	leaq	1(%r12), %rcx
	movq	%r12, %rdx
	addq	%rcx, %rax
	.p2align 4,,10
	.p2align 3
.L4:
	cmpb	$63, (%rdx)
	jne	.L3
	movb	$68, (%rdx)
.L3:
	addq	$1, %rdx
	cmpq	%rax, %rdx
	jne	.L4
.L2:
	movq	%r12, %rdx
	movq	%rbp, %rsi
	movl	$1, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
	addq	$8, %rsp
	.cfi_def_cfa_offset 24
	xorl	%eax, %eax
	popq	%rbp
	.cfi_def_cfa_offset 16
	popq	%r12
	.cfi_def_cfa_offset 8
	ret
	.cfi_endproc
.LFE35:
	.size	main, .-main
	.globl	a
	.bss
	.align 32
	.type	a, @object
	.size	a, 200100
a:
	.zero	200100
	.ident	"GCC: (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0"
	.section	.note.GNU-stack,"",@progbits
	.section	.note.gnu.property,"a"
	.align 8
	.long	1f - 0f
	.long	4f - 1f
	.long	5
0:
	.string	"GNU"
1:
	.align 8
	.long	0xc0000002
	.long	3f - 2f
2:
	.long	0x3
3:
	.align 8
4:

rule
	.file	"temp.c"
	.text
	.section	.rodata.str1.1,"aMS",@progbits,1
.LC0:
	.string	"%s"
	.section	.text.startup,"ax",@progbits
	.p2align 4
	.globl	main
	.type	main, @function
main:
.LFB35:
	.cfi_startproc
	endbr64
	pushq	%r12
	.cfi_def_cfa_offset 16
	.cfi_offset 12, -16
	leaq	a(%rip), %r12
	xorl	%eax, %eax
	pushq	%rbp
	.cfi_def_cfa_offset 24
	.cfi_offset 6, -24
	leaq	.LC0(%rip), %rbp
	movq	%r12, %rsi
	movq	%rbp, %rdi
	subq	$8, %rsp
	.cfi_def_cfa_offset 32
	call	__isoc99_scanf@PLT
	movq	%r12, %rdi
	call	strlen@PLT
	testq	%rax, %rax
	je	.L2
	subl	$1, %eax
	leaq	1(%r12), %rcx
	movq	%r12, %rdx
	addq	%rcx, %rax
	.p2align 4,,10
	.p2align 3
.L4:
	cmpb	$63, (%rdx)
	jne	.L3
	movb	$68, (%rdx)
.L3:
	addq	$1, %rdx
	cmpq	%rax, %rdx
	jne	.L4
.L2:
	movq	%r12, %rdx
	movq	%rbp, %rsi
	movl	$1, %edi
	xorl	%eax, %eax
	call	__printf_chk@PLT
	addq	$8, %rsp
	.cfi_def_cfa_offset 24
	xorl	%eax, %eax
	popq	%rbp
	.cfi_def_cfa_offset 16
	popq	%r12
	.cfi_def_cfa_offset 8
	ret
	.cfi_endproc
.LFE35:
	.size	main, .-main
	.globl	a
	.bss
	.align 32
	.type	a, @object
	.size	a, 200100
a:
	.zero	200100
	.ident	"GCC: (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0"
	.section	.note.GNU-stack,"",@progbits
	.section	.note.gnu.property,"a"
	.align 8
	.long	1f - 0f
	.long	4f - 1f
	.long	5
0:
	.string	"GNU"
1:
	.align 8
	.long	0xc0000002
	.long	3f - 2f
2:
	.long	0x3
3:
	.align 8
4:

// Problem B

#include <stdio.h>
//~ #include <iostream>
//~ #include <vector>
#include <string.h>
//~ #include <cassert>
//~ #include <algorithm>
//~ #include <set>
//~ #include <map>
//~ #include <math.h>
//~ #include <queue>
//~ #include <stack>

#define MAXN 200100
#define pb push_back
#define mp make_pair

//~ using namespace std;

//~ typedef long long int ll;
//~ typedef pair<int, int> ii;

char a[MAXN];

int main() {
  scanf("%s", a); 
  int i;
  int n = (int)strlen(a);
  for (i=0; i<n; i++)
    if (a[i] == '?')
      a[i] = 'D';
  printf("%s", a);
  return 0;
}

PDPD???
 ?P?P
 DDPP???
 ??PP
 DDPO???
 ??OP
 DDPO?>?
 ??OO
 ?>?OPDD
 @?OP

PDPDDDD DPDP DDPPDDD DDPP DDPODDD DDOP DDPOD>D DDOO D>DOPDD @DOP
Given the following C code and unoptimized assembly code, your task is to generate highly optimized x86-64 assembly code.
C Code:

```c
// Problem B

#include <stdio.h>
//~ #include <iostream>
//~ #include <vector>
#include <string.h>
//~ #include <cassert>
//~ #include <algorithm>
//~ #include <set>
//~ #include <map>
//~ #include <math.h>
//~ #include <queue>
//~ #include <stack>

#define MAXN 200100
#define pb push_back
#define mp make_pair

//~ using namespace std;

//~ typedef long long int ll;
//~ typedef pair<int, int> ii;

char a[MAXN];

int main() {
  scanf("%s", a); 
  int i;
  int n = (int)strlen(a);
  for (i=0; i<n; i++)
    if (a[i] == '?')
      a[i] = 'D';
  printf("%s", a);
  return 0;
}
```

Unoptimized Assembly Code:

```assembly
	.file	"temp.c"
	.text
	.globl	a
	.bss
	.align 32
	.type	a, @object
	.size	a, 200100
a:
	.zero	200100
	.section	.rodata
.LC0:
	.string	"%s"
	.text
	.globl	main
	.type	main, @function
main:
.LFB0:
	.cfi_startproc
	endbr64
	pushq	%rbp
	.cfi_def_cfa_offset 16
	.cfi_offset 6, -16
	movq	%rsp, %rbp
	.cfi_def_cfa_register 6
	subq	$16, %rsp
	leaq	a(%rip), %rax
	movq	%rax, %rsi
	leaq	.LC0(%rip), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	__isoc99_scanf@PLT
	leaq	a(%rip), %rax
	movq	%rax, %rdi
	call	strlen@PLT
	movl	%eax, -4(%rbp)
	movl	$0, -8(%rbp)
	jmp	.L2
.L4:
	movl	-8(%rbp), %eax
	cltq
	leaq	a(%rip), %rdx
	movzbl	(%rax,%rdx), %eax
	cmpb	$63, %al
	jne	.L3
	movl	-8(%rbp), %eax
	cltq
	leaq	a(%rip), %rdx
	movb	$68, (%rax,%rdx)
.L3:
	addl	$1, -8(%rbp)
.L2:
	movl	-8(%rbp), %eax
	cmpl	-4(%rbp), %eax
	jl	.L4
	leaq	a(%rip), %rax
	movq	%rax, %rsi
	leaq	.LC0(%rip), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	printf@PLT
	movl	$0, %eax
	leave
	.cfi_def_cfa 7, 8
	ret
	.cfi_endproc
.LFE0:
	.size	main, .-main
	.ident	"GCC: (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0"
	.section	.note.GNU-stack,"",@progbits
	.section	.note.gnu.property,"a"
	.align 8
	.long	1f - 0f
	.long	4f - 1f
	.long	5
0:
	.string	"GNU"
1:
	.align 8
	.long	0xc0000002
	.long	3f - 2f
2:
	.long	0x3
3:
	.align 8
4:
```

Only output the optimized assembly code. Do not include any other text. Do not write any comments in the assembly code. Wrap the assembly code in ```assembly``` tags.
train
	.file	"temp.c"
	.text
	.globl	a
	.bss
	.align 32
	.type	a, @object
	.size	a, 200100
a:
	.zero	200100
	.section	.rodata
.LC0:
	.string	"%s"
	.text
	.globl	main
	.type	main, @function
main:
.LFB0:
	.cfi_startproc
	endbr64
	pushq	%rbp
	.cfi_def_cfa_offset 16
	.cfi_offset 6, -16
	movq	%rsp, %rbp
	.cfi_def_cfa_register 6
	subq	$16, %rsp
	leaq	a(%rip), %rax
	movq	%rax, %rsi
	leaq	.LC0(%rip), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	__isoc99_scanf@PLT
	leaq	a(%rip), %rax
	movq	%rax, %rdi
	call	strlen@PLT
	movl	%eax, -4(%rbp)
	movl	$0, -8(%rbp)
	jmp	.L2
.L4:
	movl	-8(%rbp), %eax
	cltq
	leaq	a(%rip), %rdx
	movzbl	(%rax,%rdx), %eax
	cmpb	$63, %al
	jne	.L3
	movl	-8(%rbp), %eax
	cltq
	leaq	a(%rip), %rdx
	movb	$68, (%rax,%rdx)
.L3:
	addl	$1, -8(%rbp)
.L2:
	movl	-8(%rbp), %eax
	cmpl	-4(%rbp), %eax
	jl	.L4
	leaq	a(%rip), %rax
	movq	%rax, %rsi
	leaq	.LC0(%rip), %rax
	movq	%rax, %rdi
	movl	$0, %eax
	call	printf@PLT
	movl	$0, %eax
	leave
	.cfi_def_cfa 7, 8
	ret
	.cfi_endproc
.LFE0:
	.size	main, .-main
	.ident	"GCC: (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0"
	.section	.note.GNU-stack,"",@progbits
	.section	.note.gnu.property,"a"
	.align 8
	.long	1f - 0f
	.long	4f - 1f
	.long	5
0:
	.string	"GNU"
1:
	.align 8
	.long	0xc0000002
	.long	3f - 2f
2:
	.long	0x3
3:
	.align 8
4:
