def comb(n, r):
    res = 1
    if(n-r<r): r = n-r
    for i in range(r):
        res *= n-i
    for i in range(r):
        res /= i+1
    return int(res)

alp = []
for i in range(26):
    alp.append(int(input()))

res = alp[7]*alp[4]*alp[22]*alp[3]
ans = 0
for i in range(alp[11]-1):
    ans = max(ans, res*comb(alp[11]-i, 2)*i)

res = ans
for i in range(alp[14]):
    ans = max(ans, res*(alp[14]-i)*i)

if(alp[11]<3): ans = 0
print(ans)