0/20 20/20
60/20 80/20
120/20 140/20
180/20 200/20
240/20 260/20
300/20 320/20
360/20 380/20
420/20 440/20
480/20 500/20
540/20 560/20
600/20 620/20
660/20 680/20
720/20 740/20
780/20 800/20
840/20 860/20
900/20 920/20
960/20 980/20
1020/20 1040/20
1080/20 1100/20
1140/20 1160/20
60/1 61/1