from random import randint
sequence = [randint(0, 100) for i in range (20)]
print(sequence)

number = int(input( "which number should I look for?"))

found = False
for position, item in enumerate(sequence):
        if item == number:
            print("your number is in position {}".format(position ))
            found = True
if found == False:
    print("Your number is not in the set")