6mepqa 5mepq 4mep 3mepqa 2mepq
hwdpq gwdp fwdpqa ewdpq dwdp
s5cp r5cpqa q5cpq p5cp o5cpqa
3ecpqa 2ecpq 1ecp 0ecpqa zecpq
eobpq dobp cobpqa bobpq aobp