HELPING THE OTHERS REALIZE THE ADVANTAGES OF 12345ASDF

We search for the placement p of each character of your enter inside a string S the place the keyboard rows are interleaved: the very first 4 figures are '1QAZ' (very first column on the keyboard), another 4 characters are '2WSX' (2nd column from the keyboard) and so on. Unused positions are padded with underscores and the last kinds are only disca