=SIERREUR(INDEX(C$4:C$1000;EQUIV(GRANDE.VALEUR(SI(ESTTEXTE(C$4:C$1000);SI(LIGNE(C$4:C$1000)=EQUIV(C$4:C$1000;C:C;0);NB.SI(C$4:C$1000;C$4:C$1000)-LIGNE(C$4:C$1000)/"1E9"));LIGNES(E$4:E4));SI(ESTTEXTE(C$4:C$1000);SI(LIGNE(C$4:C$1000)=EQUIV(C$4:C$1000;C:C;0);NB.SI(C$4:C$1000;C$4:C$1000)-LIGNE(C$4:C$1000)/"1E9"));0));"")