from collections import Counter


for casen in range(int(input())):
    n,m = (int(x) for x in input().split())
    models = Counter((int(x) for x in input().split()))
    p_lst = [[int(x) for x in input().split()] for _ in range(n)]
    p_cnt = [Counter(row) for row in p_lst]

    ans = 0
    unchanged = list(models)
    changed = []

    for i in range(n):
        changed_new = []
        unchanged_new = []

        for s in changed:
            if p_cnt[i].get(s,0) > 0:  # do I need to change?
                p_cnt[i][s] -=1
                changed_new.append(s)
            else:  # change again
                ans += 1
        
        for s in unchanged:
            if p_cnt[i].get(s,0) > 0:
                p_cnt[i][s] -=1
                unchanged_new.append(s)

        
        for key in p_cnt[i]:
            for _ in range(p_cnt[i][key]):
                changed_new.append(key)
        
        unchanged = list(unchanged_new)
        changed = list(changed_new)
    
    print("Case #{}: {}".format(casen+1, ans))