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")
