$//$ TODO: You should search the string "oldString" for the text found in $"$

commandWords" starting from index $1$ to the end of the string array

$//1.$ First check if the length of commandWords is less than $2.$ If it is$,$ then

print an error using printHelp and return null.

$//2.$ Get the text you need to search oldString for. Use combineWordsFrom$($

commandWords,$1)$ to get the appropriate text.

$//3.$ Print out the index where the text is found in oldString $($or $-1$ if not

found$).$ Use the String function indexOf for this.

$//4.$ Return null $($since searchText does not change the current string$).$