using python and arrays:

A company wants to transmit data over the telephone but is concerned that its phones may be tapped. It has asked you to write a program that will encrypt its data so that the data may be transmitted more securely. All of its data is transmitted as four-digit integers. Your application should read a four-digit integer entered by the user and encrypt it as follows: Replace each digit with the result of adding 7 to the digit and getting the remainder after dividing the new value by 10. Then swap the first digit with the third and swap the second digit with the fourth. Then print the encrypted integer. Decrypt and print it.