'''
n = int(input())

if n >= 90:
    print("a")
elif n >= 80:
    print("b")
elif n >= 70:
    print("c")
else:
    print("f")
'''
run =[1, 3, 4, 5, 6]

run.append(7)
print(run)

run.insert(1, 2)
print(run)

run.remove(1)
print(run)

run2 = [3, 6, 7, 2, 4, 1, 5]
run2.sort()
print(run2)