1.should take input digit from user
2.should print series of numbers with adjacent elements sum as prime num
3.should print all possible sequence of numbers
For ex:
If use enter 4
4123
1234
4321
4132
2143
2341
3214
3412

Please clarify your question. I don't follow how the sequence works. How does a starting digit of 4 generate 4123? And what do you mean by "adjacent elements?" The sum of numbers "adjacent" to 4123 is not prime: 4122+ 4124= 8246. Clearly you must have something else in mind.