Mapped strings prob in online course

#1

https://online.codingblocks.com/player/10922/content/4947?s=1639
https://ide.codingblocks.com/s/41586

code compiles but there’s no o/p, what’s wrong in syntax or logic?

#2

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#3

Why is the output not being printed https://ide.codingblocks.com/s/55156
I have even tried passing the vector as an argument https://ide.codingblocks.com/s/55160

The question is ----
MAPPED STRINGS
We are given a hashmap which maps all the letters with number. Given 1 is mapped with A, 2 is mapped with B……26 is mapped with Z. Given a number, you have to print all the possible strings.

Input Format:
A single line contains a number.

Constraints:
Number is less than 10^6

Output Format
Print all the possible strings in sorted order in different lines.

Sample Input
123
Sample Output
ABC
AW
LC