The program will input a string then display all the letters used in the input with their corresponding number of occurrences in the input

Question

Sample: Input a String: This is FUN. Letter    Count f   =   1 h   =   1 i   =   2 n   =   1 s   =   2 t   =   1 u   =   1   If the letters are the same, lowercase and uppercase they should count as one.