../dxfcvt -i p0.dxf -odxf 0; cat 0.lay 0.ent > /tmp/0.dxf
../dxfcvt -i p1.dxf -odxf 1; cat 1.lay 1.ent > /tmp/1.dxf
../dxfcvt -i p2.dxf -odxf 2; cat 2.lay 2.ent > /tmp/2.dxf
../dxfcvt -i p3.dxf -odxf 3; cat 3.lay 3.ent > /tmp/3.dxf
../dxfcvt -i p.dxf  -odxf 4; cat 4.lay 4.ent > /tmp/4.dxf
