n = int(input())
s = input()
ori_kc = '#...#.#####'
ori_ku = '#...#.#...#'
n_che = n // 11
ans_kc = ''
ans_ku = ''

for i in ori_kc:
    ans_kc += i * n_che
for i in ori_ku:
    ans_ku += i * n_che

print('KCPC') if s == ans_kc else print('KUPC')