1--fd-d--d--f-fg-g-g--f--g-gh

1--dh-h-hghgf--hf-gh--gh--h-hjh-h--h--h-hghg-gf-fgh

1--cdffg-f-f--fe-fg--ef--d-defe-ed--d--d-defedc-d-fefgf

1--klk-hjkj-hg--hg-h--k--j-jlk-kj--k--k-lk-khjkj-hg-ghk