s = input()
if "L" in s[0::2] or "R" in s[1::2]:
  print("No")
else:
  print("Yes") s = input() s input() input if "L" in s[0::2] or "R" in s[1::2]:
  print("No")
else:
  print("Yes") "L" in s[0::2] or "R" in s[1::2] "L" in s[0::2] "L" s[0::2] s 0::2 0 2 "R" in s[1::2] "R" s[1::2] s 1::2 1 2 print("No") print "No" print("Yes") print "Yes" s = input() input() s
s = input()
if "L" in s[0::2] or "R" in s[1::2]:
  print("No")
else:
  print("Yes")