europ[8], opeer[6], reper[6], peror[6],
puer[7], repu[7], poru[7], euro[6], ruro[6], oper[5], pero[5], oere[4],
opu[6], oru[5], rur[5], per[4], rep[4], por[4], pro[4], rop[4], prr[4], ero[3],
pe[3], op[3], po[3], ee[2], eo[2], er[2], re[2], or[2], ro[2],
