=SI(NBVAL(DECALER($C$7;EQUIV($C$29;$C$8:$C$19;0);EQUIV($C$30;$D$7:$G$7;0);
EQUIV(EQUIV($C$29;$C$8:$C$19;0)+0.5;($C$8:$C$19<>"")*(LIGNE($C$8:$C$19)-7);1)-
EQUIV($C$29;$C$8:$C$19;0)+1))<LIGNE()-28;"";INDEX((DECALER($C$7;
EQUIV($C$29;$C$8:$C$19;0);EQUIV($C$30;$D$7:$G$7;0);EQUIV(EQUIV(
$C$29;$C$8:$C$19;0)+0.5;($C$8:$C$19<>"")*(LIGNE($C$8:$C$19)-7);1)-EQUIV(
$C$29;$C$8:$C$19;0)+1));LIGNE()-28))