iii iim iip iis iit im- imi imm imp ims imt ipi ipm ipp ips ipt is- isi ism isp iss ist iti itm itp its itt mi- mii mim mip mis mit mmi mmm mmp mms mmt mpi mpm mpp mps mpt msi msm msp mss mst mti mtm mtp mts mtt p-p pii pim pip pis pit pmi pmm pmp pms pmt ppi ppm ppp pps ppt ps- psi psm psp pss pst pt- pti ptm ptp pts ptt sii sim sip sis sit smi smm smp sms smt spi spm spp sps spt ss- ssi ssm ssp sss sst sti stm stp sts stt tii tim tip tis tit tmi tmm tmp tms tmt tpi tpm tpp tps tpt tsi tsm tsp tss tst tti ttm ttp tts ttt