111 ``` 111 ``` 1`1 1`1 `1` `1` ppp --- ppp --- p-p p-p -p- -p- ppp === ppp === p=p p=p =p= =p= ppp [[[ ppp [[[ p[p p[p [p[ [p[ ppp ]]] ppp ]]] p]p p]p ]p] ]p]  ppp \\\ ppp \\\ p\p p\p \p\ \p\ 9-0 9-0 0-9 0-9 9-0=9 9-0=9 [9] [9] [pop] [pop] p:\ p:\