1. Start on an otherwise blank tape marked with 's (I am assuming the alphabet the symbols may be chossen from is ) with the reading head positioned over the rightmost non-blank cell. Finish with an otherwise blank tape with the reading head over the right most of a block 's
2. Start over on an otherwise blank tape marked with 's seperated by one blank from a block of 's, end with a tape otherwise blank with and 's seperated by a blank.