8 (один ноль и четные вокруг нуля)

#8й https://kpolyakov.spb.ru/school/ege/gen.php?action=viewVar&answers=on&varId=7
sl = '012345678'
even = '02468'
num = 1
answ = 0
for q in '12345678':
    for w in sl:
        for e in sl:
            for r in sl:
                for t in sl:
                    s = q + w + e + r + t
                    if s.count('0') != 1:
                        continue
                    nul = s.index('0') #s.find('0')
                    #for i in range(5): найти индекс через цикл
                    #    if s[i] == '0':
                    #        nul = i
                    if nul == 4 and s[nul - 1] in even:
                        answ += 1
                    elif nul < 4 and s[nul - 1] in even and s[nul + 1] in even:
                        answ += 1
print(answ)