91r4ho 81r4h 71r4 61r4ho 51r4h
kbr4h jbr4 ibr4ho hbr4h gbr4
vkq4 ukq4ho tkq4h skq4 rkq4ho
6tp4ho 5tp4h 4tp4 3tp4ho 2tp4h
h3o4h g3o4 f3o4ho e3o4h d3o4