T = list(input())

for i in range(len(T)):
    if 2 <= i and T[i-2:i+1] == list("SKG"):
        print("No")
        break
    if T[i] == ".":
        if 2 <= i and T[i-2:i] == list("SK"):
            T[i] = "K"
        else:
            T[i] = "G"
else:
    print("Yes")
    print("".join(T))