T = input()
N = len(T)

if("SKG" in T):
    print("No")
else:
    print("Yes")
    T = list(T)
    for i in range(N):
        if(T[i] != "."):continue
        if(T[i-2:i] == ["S","K"]):
            T[i] = "K"
        else:
            T[i] = "G"
    print("".join(T))