import sys

def debug(x, table):
    for name, val in table.items():
        if x is val:
            print('DEBUG:{} -> {}'.format(name, val), file=sys.stderr)
            return None

def solve():
    gcp_y = [int(i) for i in input().split()]
    gcp_em = [0, 0, 0]
    hands = input().rstrip()

    for hand in hands:
        if hand == 'G':
            gcp_em[0] += 1
        elif hand == 'C':
            gcp_em[1] += 1
        else:
            gcp_em[2] += 1

    score = 0

    kati = 0
    for i in range(3):
        if gcp_y[i] > gcp_em[(i + 1) % 3]:
            kati += gcp_em[(i + 1) % 3]
            gcp_y[i] -= gcp_em[(i + 1) % 3]
            gcp_em[(i + 1) % 3] = 0
        else:
            kati += gcp_y[i]
            gcp_em[(i + 1) % 3] -= gcp_y[i]
            gcp_y[i] = 0

    score += kati * 3

    aiko = 0
    for i in range(3):
        if gcp_y[i] > gcp_em[i]:
            aiko += gcp_em[i]
            gcp_y[i] -= gcp_em[i]
            gcp_em[(i + 1) % 3] = 0
        else:
            aiko += gcp_y[i]
            gcp_em[i] -= gcp_y[i]
            gcp_y[i] = 0

    score += aiko * 1

    print(score)

if __name__ == '__main__':
    solve()