Sorting list of lists with string and int

[buran]

actually, the easiest way would be to add sorted to your line 5 list comprehension

a = [sorted(input().split()) for i in range(n)]

this way you always get the number as element with index 0 because when sorting '0' to '9' always go before 'A'

def parse_data(item):
    return (int(item[0]), item[1])


data = ['red 10', '10 blue', 'green 7']
data = [parse_data(sorted(item.split())) for item in data]
output = [cup for radius, cup in sorted(data)]
print('\n'.join(output))

note that sample output in your assignment is NOT correct