TETRODES

de do ed er es et od oe or os re so to

dee doe dor dos dot eds ere ers ode ods oes ore ors ort ose red ree res ret rod roe rot see ser set sod sot ted tee tet tod toe tor tot

deer dees deet dere doer does dore dors dose dost dote dots dree eros erst odes ores orts rede redo reds reed rees rest rete rets rode rods roes rose rote rots seed seer sere sett sord sore sort stet stot teds teed tees test tets tods toed toes tore tors tort tost tote tots tree tres tret trod trot