#Write a program to open three files 1.txt, 2.txt, and 3.txt. 
# if any of these files are not present, a message without exiting the program must be printed prompting the same.

def readFile(filename):
    try:
        with open(filename, "r") as f:
            print(f.read())
    except FileNotFoundError:
        print(f"File {filename} is not found")
readFile("1.txt")
readFile("2.txt")
readFile("3.txt")