=INDEX($A$21:$A$30;EQUIV(VRAI;DECALER($B$21:$B$30;;EQUIV($B6;$B$20:$M$20;0)-1)>0;0))
INDEX(A$21:A$29;EQUIV(MAX(DECALER(A$21:A$29;;EQUIV(B6;B$20:M$20;0)));DECALER(A$21:A$29;;EQUIV(B6;B$20:M$20;0));0);0)
=INDEX($B$35:$M$42;EQUIV(D$45;$A$35:$A$42;0);EQUIV($A46;$B$34:$M$34;0))
=TRANSPOSE(B35:M42)