Using Scheme higher-order function map to implement the string encryption and decryption. 1.1 The encryption function must (1) take the encryption key (key can be between 1 and 4) from the keyboard using (read); and (2) encrypt alphabetic characters and digits only.
1.2 The decryption function must (1) Use the same encryption key from 1.1 for decryption and (2) decrypt the string generated from your encryption function.
Test cases:
(encrypt "Hello CSE240!")
(decrypt "Khoor FVH573!")
3
"Khoor FVH573!"
3
"Hello CSE240!"
Note: When you encrypt a valid character (letters and digits), you add a key to the character. When you decrypt, you will have a different set of the valid characters, which is caused by +key. You can limit the allowed key value to be 1, 2, 3, and 4.

i don't know to be honest but you on your own

step-by-step explanation:

ignitia made me retarted fool im stoopid laugh like shi

explanation:

a  social news website  is an  internet  website  that features  user-posted stories. such stories are ranked based on popularity, as voted on by other users of the site or by website administrators. users typically comment online on the news posts and these comments may also be ranked in popularity. since their emergence with the birth of  web 2.0, social news sites have been used to link many types of information, including news, humor, support, and discussion. all such websites allow the users to submit content and each site differs in how the content is moderated. on the  slashdot  and  fark  websites,  administrators  decide which articles are selected for the front page. on  reddit  and  digg, the articles that get the most votes from the community of users will make it to the front page. many social news websites also feature an online comment system, where users discuss the issues raised in an article. some of these sites have also applied their voting system to the comments, so that the most popular comments are displayed first. some social news websites also have a  social networking  function, in that users can set up a user profile and follow other users' online activity on the website.