T = input()

if T.find('SKG') != -1:
    print('No')
    exit()

ans = []
for i, c in enumerate(T):
    if c == '.':
        if i+1 < len(T) and T[i+1] == 'K':
            ans.append('K')
        else:
            ans.append('S')
    else:
        ans.append(c)

print('Yes')
print(*ans, sep='')