v1 = [10]

listA = [v1, 11, 12]
listB = [v1, 13, 14]

for i in listA: 
    if isinstance(i, list): i[0] += 10 
    else: i += 10
for i in listB: 
    if isinstance(i, list): i[0] += 10 
    else: i += 10

print listA[0]
print listB[0]