Write a google script/formula for google spreadsheet

I am looking for someone who can write a google script/formula for our google spreadsheet. Please review the attached screenshot to understand the script logic. This is the setup: I place 5 lists into the spreadsheet (List 1, 2, 3, 4, 5). Every list has 2 columns. One Column for the word and one column for a number. This is what the script needs to do: The script needs to merge the same word and count the number behind the word together. All that needs to be done in a list hierarchy. This is the script logic: Merge list 1 into 2,3,4,5 and save the left over words into result 1 column Merge list 2 into 3,4,5 and save the left over words into result 2 column Merge list 3 into 4,5 and save the left over words into result 3 column Merge list 4 into 5 and save the left over words into result 4 column Please review everything and just apply if you understand and have the skills to do the job. End your job application with the word 'letsstart' so I know you have read the job description.