1--d--cd-ffg-f--gh-g--f-fe-fg-ef--de-fe-ed

1--h-k-kl-lklkj--lmlm-mnon-nmn--m-mlk-lkmlk-lml-jlk-kj--l

1--l-l-lmnmlkj--klkj--k-k-k-lj-klkl--lm-nmml

1--f-fdfgfe-f--fe--e--f-g-f--f--ef-ed-e-ed