Oring bins of different coverage points to another cover point

Coverage
1

I wan to oring bins of different cover points to one bins ,
Means for example:
covergroup @(posedge clk);
cp1 : coverpoint x1{
bins b1 = (ST0 => ST1 => ST2 => ST3);
cp2 : coverpoint x2{
bins b1 = (ST0 => ST1 => ST2 => ST3);
cp3 : coverpoint x3{
bins b1 = (ST0 => ST1 => ST2 => ST3);
cp4 : coverpoint x4{
bins b1 = (ST0 => ST1 => ST2 => ST3);
}

cp : coverpoint X{
bins b = ??
}

endgroup
I wan if either of 4 cps bins get hit highlight one to be covered,

Is there a simple way of oring different bins of cps??