import sys
import os
 
ii = lambda: int(sys.stdin.buffer.readline().rstrip())
il = lambda: list(map(int, sys.stdin.buffer.readline().split()))
fl = lambda: list(map(float, sys.stdin.buffer.readline().split()))
iln = lambda n: [int(sys.stdin.buffer.readline().rstrip()) for _ in range(n)]
 
iss = lambda: sys.stdin.buffer.readline().decode().rstrip()
sl = lambda: list(map(str, sys.stdin.buffer.readline().decode().split()))
isn = lambda n: [sys.stdin.buffer.readline().decode().rstrip() for _ in range(n)]
 
 
def main():
    if os.getenv("LOCAL"):
        sys.stdin = open("input.txt", "r")
 
    A, B, C = sl()
    print(A[0] + B[0] + C[0])
 
 
if __name__ == '__main__':
    main()