PRESTRESSING

en er es et in is it ne pe pi re si ti

eng ens ere erg ern err ers ess gee gen get gie gin gip git ins ire its nee neg net nip nit pee peg pen per pes pet pie pig pin pis pit psi pst ree reg rei rep res ret rig rin rip see seg sei sen ser set sin sip sir sis sit sri tee teg ten tie tin tip tis

eger egis engs ergs erne erns errs erst eses esne gees gene gens gent gest gets gien gies gins gips girn girt gist gite gits gree grin grip grit ires neep negs ness nest nets nips nite nits peen peer pees pegs pein pens pent pere peri pert pest pets pier pies pigs pine ping pins pint pirn piss pits pree prig psis psst rees regs rein reis rent reps rest rete rets rigs ring rins ripe rips rise rite seen seep seer sees segs seis sene sent sept sere sers sets sign sine sing sins sipe sips sire sirs site sits snip snit spin spit sris step stir teen tees tegs tens tern tier ties tine ting tins tips tire tree tres trig trip