import sys
sys.set_int_max_str_digits(0)

T = input()
if 'SKG' in T:
    exit(print('No'))
print('Yes')
T = list(T)
N = len(T)
pre = 'G'

for i in range(N):
    if T[i] == '.':
        if pre == 'K':
            T[i] = 'K'
        else:
            T[i] = 'G'
    pre = T[i]
print(''.join(T))