Problèmme de code

print("Entrez un code alpha-numérique")
a = str(input())
b = 0
c = 0
d = 0
e = 0
f = 0
g = 0
h = 0
z = 0
code = co[b], co[c], co[d], co[e], co[f], co[g], co[h]
code = str(code)
while a != code:
        print(co[b], co[c], co[d], co[e], co[f], co[g], co[h])
        b = b + 1
        if code in a:
            print("le code est : ", code)  
        if b == 36 and c != 36 :
            c = c + 1
            b = 0
        if b == 36 and c == 36 and d != 36:
            b = 0
            c = 0
            d = d + 1
        if b == 36 and c == 36 and d == 36 and e != 36:
            b = 0
            c = 0
            d = 0
            e = e + 1
        if b == 36 and c == 36 and d == 36 and e == 36 and f != 36:
            b = 0
            c = 0
            d = 0
            e = 0
            f = f + 1
        if b == 36 and c == 36 and d == 36 and e == 36 and f == 36 and g != 36:
            b = 0
            c = 0
            d = 0
            e = 0
            f = 0
            g = g + 1
        if b == 36 and c == 36 and d == 36 and e == 36 and f == 36 and g == 36 and h != 36:
            b = 0
            c = 0
            d = 0
            e = 0
            f = 0
            g = 0
            h = h + 1
        if b == 36 and c == 36 and d == 36 and e == 36 and f == 36 and g == 36 and h == 36 and i != 36:
            b = 0
            c = 0
            d = 0
            e = 0
            f = 0
            g = 0
            h = 0
            i = i + 1