m21b n21b1 o21b12 p21b q21b1
bt2b1 ct2b12 dt2b et2b1 ft2b12
0j3b12 1j3b 2j3b1 3j3b12 4j3b
pa4b qa4b1 ra4b12 sa4b ta4b1
e14b1 f14b12 g14b h14b1 i14b12