1--df-gh-hgf--hkgf-gh-hgf-fed-df--fgh--ghk-klk-hjhg

1--dh-hghgf--g-g--g-g--gh-g--g-g

1--gh-g--gh-g-fh-kjk-lklm-l--kl--l-mno-o-mlm-nmn-ml