showyou

S = input()
flag = 'WA'
if S[0] == 'A':
    ss = S[1]
    s = S[2:]
    cnt_c = 0
    for i in range(len(s)-1):
        m = s[i]
        if m == 'C':
            cnt_c += 1

showyou

R = int(input())

if R < 1200:
    C = 'ABC'
elif R < 2800:
    C = 'ARC'
else:
    C = 'AGC'
print(C)

showyou

S = input()
w = int(input())

i = 0
while i < len(S):
    print(S[i], end="")
    i += w

showyou

a, b = map(int, input().split())

if a * b == 15:
    print("*")
elif a + b == 15:
    print("+")
else:
    print("x")

showyou

N = int(input())
A = list(map(int, input().split()))

print(max(A)-min(A))

showyou

N = int(input())

if N % 2 == 1:
    m = N * 2
else:
    m = N

print(m)

showyou

K = input()
h = int(K)
i = 0


num = 1
while h > 0:

    i += num
    if i >= 9: num = 10

showyou

N = input()
S = 0
for i in N:
    S += int(i)
if int(N) % S == 0:
    print("Yes")
else:
    print("No")

showyou

S = input()
def is_plus(a):
    if a == '+':
        return 1
    else:
        return -1

ans = 0
for i in range(4):
    ans += is_plus(S[i])

showyou

x = int(input())

m = 1
for i in range(1, x):
    for j in range(2, x):
        k = pow(i, j)
        if k <= x:
            m = max(k, m)
        else:
            break