a) the prepositions be- / in, le- / to, mi- / from
b) b) personal pronouns – dative (to me, to you etc.)

Personal pronouns in dative are formed with the preposition le-, to + ending

singularplural
mfmf
to meליto usלנו
lilanu
to youלךלךto youלכםלכן
lechahlachlachemlachen
to him/herלולהto themלהםלהן
lolahlahemlahen