The mapping of numbers to letters (just like phone buttons) is given below. Note that 1 does not match any letter.
Given a vector containing the numbers 2-9 with the R script you will write, print all possible letter combinations that the number can represent. You can compose the answer in any order.
For example:
v=[2.7]
output:
aj
ak
al
bj
v=[6,4,5]
output:
mgj
mhk