a python code that creates a function that takes a string and a number and return nprint$($ngrams list$($computer$,2))$

$[$co$,$om$,$mp$,$pu$,$ut$,$te$,$er$]-$grams of the string as a list. sample is print$($ngrams list$($computer$,2))$

$[$co$,$om$,$mp$,$pu$,$ut$,$te$,$er$]$