lc1bng mc1b nc1bn oc1bng pc1b

a31b b31bn c31bng d31b e31bn

zt2bn 0t2bng 1t2b 2t2bn 3t2bng

ok3bng pk3b qk3bn rk3bng sk3b

db4b eb4bn fb4bng gb4b hb4bn