mod = 1000000007
eps = 10**-9


def main():
    import sys
    input = sys.stdin.readline

    N = input().rstrip('\n')

    cnt = [0] * 8
    for n in N:
        cnt[1] += 1
        if n == "A":
            cnt[2] += 1
        elif n == "B":
            cnt[3] += 1
        elif n == "C":
            cnt[4] += 1
        elif n == "D":
            cnt[5] += 1
        elif n == "E":
            cnt[6] += 1
        else:
            cnt[7] += 1
    ma = -1
    I = []
    for x in range(8):
        if cnt[x] > ma:
            ma = cnt[x]
            I = [x]
        elif cnt[x] == ma:
            I.append(x)
    print(*I)


if __name__ == '__main__':
    main()