Solutions :

Il y a 26 mots de 3 lettres (1 point) :

ERS; FIE; FIN; FIS; FIT; IFS; IRE; NES; NET; NIE; NIF; NIT; RIE; RIF; RIS; RIT; SEN; SET; SIR; SIS; TER; TES; TIF; TIN; TIR; TRI.

Il y a 44 mots de 4 lettres (1 point) :

FIER; FIES; FINE; FINN; FINS; FITS; IRES; NIER; NIES; NIET; NIFS; NITS; REIN; REIS; RIEN; RIES; RIFS; RIFT; RISS; RITE; RITS; SEIN; SENS; SENT; SERS; SERT; SIEN; SIRE; SIRS; SISE; SITE; SNIF; TIEN; TIFS; TINE; TINS; TINT; TIRE; TIRS; TISE; TRES; TRIE; TRIN; TRIS.

Il y a 36 mots de 5 lettres (2 points) :

FIENT; FIERS; FINES; FINNS; FITES; INTER; NITRE; REINS; RETIF; RIENS; RIENT; RITES; SEINS; SENTI; SERIN; SERTI; SIENS; SIRES; SITES; SNIFS; STRIE; TEINS; TEINT; TENIR; TIENS; TIENT; TIERS; TINES; TINTE; TIRES; TIRET; TISER; TITRE; TRIES; TRINE; TRINS.

Il y a 22 mots de 6 lettres (3 points) :

FIRENT; INTERS; NITRES; RETIFS; RETINS; RETINT; SENTIR; SENTIS; SENTIT; SERINS; SERTIS; SERTIT; SINTER; SISTRE; STRIES; TINTER; TINTES; TIRENT; TISENT; TITRES; TRIENT; TRINES.

Il y a 3 mots de 7 lettres (7 points) :

SINTERS; STRIENT; TITRENT.