o3nclb p3nc q3ncl r3nclb s3nc

duoc euocl fuoclb guoc huocl

2kpcl 3kpclb 4kpc 5kpcl 6kpclb

rbqclb sbqc tbqcl ubqclb vbqc

g2qc h2qcl i2qclb j2qc k2qcl