need help running this program, tried copy pasting on my program but it can't run

6. [10] Assume that the file "ui.txt" contains the following text: Python is an object-oriented language. Find the output printed by this program. with open("ui.txt", "r") as input: print(input.read(6)) #prints print(input.tell() #prints input. seek (20) print(input.read(3)) #prints print(input.tell()) #prints input. seek(0,2) print(input.tell()) #prints