C = [int(input()) for _ in range(26)]
n = 1
n = C[7]*C[4]*C[22]*C[17]*C[3]
n1 = C[14]
n11=n1//2
n12 = n1-n11
n = n*n11*n12
n2 = C[11]
n21 = n2//3
n2 = n2-n21
n22 = n2//2
n23 = n2-n22
n = n*n21*n22*n23
print(n)