$fn=100;

difference(){
    difference (){
        cylinder (4, 10, 10);
        translate([0,0,-5]) cylinder (10, 9, 9);
    for ( i=[10:15:360]) {
    rotate([i,90,0])
    translate([-3,9,0])
    cube([2,1,1]);
    }
    }
}
difference(){
    difference(){
        translate([0,11,2])rotate([90,0,0])cylinder(2,7,7);
        translate([0,13,2])rotate([90,0,0])cylinder(3,6,6);
    }
    translate ([0,0,2])
    for ( i=[1:10:360]) {
        rotate([i,0,90])
        translate([11,6,2.5])
        sphere(0.4);
}}


t = "J";

rotate([90,0,180])translate([-5,-1,10]){
    linear_extrude(1) {
        text(t, 9,font= "Mongolian Baiti:style=Regular");
}
}
d = "A";

rotate([90,0,180])translate([-3.5,-2.5,10]){
    linear_extrude(1) {
        text(d, 9,font= "Mongolian Baiti:style=Regular");
}
}