#masque-INST-1{
position:absolute;
top:-1px;
}

#masque-INST-2{
position:absolute;
top:-1px;
left:108px;
}

#masque-INST-3{
position:absolute;
top:-1px;
left:216px;
}

#masque-INST-4{
position:absolute;
top:-1px;
left:324px;
}

#masque-INST-5{
position:absolute;
top:-1px;
left:432px;
}

#masque-INST-6b{
position:absolute;
top:-1px;
left:540px;
}