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