kbr4x jbr4 ibr4xc hbr4x gbr4

vkq4 ukq4xc tkq4x skq4 rkq4xc

6tp4xc 5tp4x 4tp4 3tp4xc 2tp4x

h3o4x g3o4 f3o4xc e3o4x d3o4

sco4 rco4xc qco4x pco4 oco4xc