Python or Java program

A MOMENT AGO (LOCAL TIME FOR NAEEM: FRI 11:51 PM)
i need to create a bot that can do the following

Tell me what any number value would be if that number were a letter... following this very exact pattern

1=b
2= c
3= d
4=e
5= f
6=g
7=a

now here the numbers should continue on in sequence of counting. However, the letters always repeat. So for example the value of 8 would be B and repeating.

can you do this?