1dbr 2dbr7 3dbr7n 4dbr 5dbr7
q4br7 r4br7n s4br t4br7 u4br7n
fvcr7n gvcr hvcr7 ivcr7n jvcr
4ldr 5ldr7 6ldr7n 7ldr 8ldr7
tcer7 ucer7n vcer wcer7 xcer7n