Adding the rows of sheets to a master sheet.

In the workbook, it has 4 sheets :- Input1, Input2, Input3 & Output. I simply want to merge the contents of Input1, Input2 and Input3 to sheet "output". "Output" sheet should also include a column G where it simply writes "Zero" if the column F is 0 or 1 with "One" or 2 with "Two".

Number of rows in sheets "Input1, Input2 & Input3" are not fixed. I get sheets daily where number of rows can be anything from 1 to 1000.

Please download the excel sheet attached and it would be crystal clear to you.