L = [('Bob', 75), ('Adam', 92), ('Bart', 66), ('Lisa', 88)]
def by_name(t):
    return t[0].lower()
def by_score(t):
    return t[1]
L2 = sorted(L,key=by_name)
L3 = sorted(L,key = by_score)
print(L2)
print(L3)