print nth number in two digits

Question

example:
input:
4
7
9
output:
47
74
477
744
747

Answer 1

no. inputs are 1,2,3 or 4,5,6 many
3 numbers are input
first two numbers only make digits like 1,2,3 is input 12,21,121,212,....... not present in 3

Answer 2

that the question third number is not present in output towrite the coding

Answer 3

i don't have answer.so please help to give the answer