USACO MAR07 Silver Balanced Lineup 平衡的陣容
USACO MAR07 Silver Cow Traffic 奶牛交通
USACO OCT07 Silver Obstacle Course 障礙訓練場
USACO NOV07 Silver Cow Hurdles 奶牛跨欄
USACO NOV07 Silver Milking Time 擠奶時間
USACO DEC07 Silver Building Roads 建造路徑
USACO JAN08 Silver Telephone Lines 架設電話線
USACO JAN08 Silver Cow Contest 奶牛的比賽
USACO JAN08 Bronze Costume Party 化裝晚會
USACO FEB08 Silver Eating Together 麻煩的聚餐
USACO FEB08 Silver Meteor Shower 流星雨
USACO FEB08 Silver Game of Lines 連線遊戲