yf1x zf1x7 0f1x7y 1f1x 2f1x7

n61x7 o61x7y p61x q61x7 r61x7y

cx2x7y dx2x ex2x7 fx2x7y gx2x

1n3x 2n3x7 3n3x7y 4n3x 5n3x7

qe4x7 re4x7y se4x te4x7 ue4x7y