d3bg e3bgc f3bgca g3bg h3bgc

2tcgc 3tcgca 4tcg 5tcgc 6tcgca

rkdgca skdg tkdgc ukdgca vkdg

gbeg hbegc ibegca jbeg kbegc

51egc 61egca 71eg 81egc 91egca