S = input()
n = len(S)
for i in range(n-2):
	if S[i: i+3] == "SKG":
		print("No")
		exit()
Ans = [s for s in S]
for i in range(n):
	if Ans[i] == ".":
		if i and Ans[i-1] == "S":
			Ans[i] = "G"
		else:
			Ans[i] = "K"
print("Yes")
print("".join(Ans))