set cons(triples) {Spr Spl Str skr skl}
set cons(pairs) {pr br tr dr kr gr fr Sr pl bl kl gl fl Sl Sm kn gn Sn kv Sv Sp St sk tsv pfl pfr}
set cons(singles) {p b t d k g f v s z S Z C x m n N l r j h Q ts pf}