qto14 pto1 oto144 nto14 mto1
12n1 02n144 z2n14 y2n1 x2n144
ccn144 bcn14 acn1 9bn144 8bn14
nlm14 mlm1 llm144 klm14 jlm1
yul1 xul144 wul14 vul1 uul144