Contractions

Contract verbs   Contractions
    file/w7 becomes 7filw~   e/  + w7contracts to7w~
    file/ei7 becomes 7filei=   e/  + ei7contracts to7ei=
    fi/lee7 becomes 7fi/lei    + e 7contracts to7ei
    file/ete7 becomes 7filei=te   e/  + e 7contracts to7ei=