inp = input('请输入各基因型数量:a,b,c,d,f,g: ')
[a, b, c, d, f, g] = map(int, inp.split(' '))
AA_AA = 1
AA_Aa = 1
AA_aa = 1
Aa_Aa = 0.75
Aa_aa = 0.5
aa_aa = 0
expected = (AA_AA * a + AA_Aa * b + AA_aa * c + Aa_Aa * d + Aa_aa * f + aa_aa * g) * 2
print(expected)