0/30 60/30
120/30 180/30
240/30 300/30
360/30 420/30
480/30 540/30
600/30 660/30
720/30 780/30
840/30 900/30
960/30 1020/30
1080/30 1140/30
1200/30 1260/30
1320/30 1380/30
1440/30 1500/30
1560/30 1620/30
1680/30 1740/30
60/1 61/1