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))
{"html5":"htmlmixed","css":"css","javascript":"javascript","php":"php","python":"python","ruby":"ruby","lua":"text\/x-lua","bash":"text\/x-sh","go":"go","c":"text\/x-csrc","cpp":"text\/x-c++src","diff":"diff","latex":"stex","sql":"sql","xml":"xml","apl":"apl","asterisk":"asterisk","c_loadrunner":"text\/x-csrc","c_mac":"text\/x-csrc","coffeescript":"text\/x-coffeescript","csharp":"text\/x-csharp","d":"d","ecmascript":"javascript","erlang":"erlang","groovy":"text\/x-groovy","haskell":"text\/x-haskell","haxe":"text\/x-haxe","html4strict":"htmlmixed","java":"text\/x-java","java5":"text\/x-java","jquery":"javascript","mirc":"mirc","mysql":"sql","ocaml":"text\/x-ocaml","pascal":"text\/x-pascal","perl":"perl","perl6":"perl","plsql":"sql","properties":"text\/x-properties","q":"text\/x-q","scala":"scala","scheme":"text\/x-scheme","tcl":"text\/x-tcl","vb":"text\/x-vb","verilog":"text\/x-verilog","yaml":"text\/x-yaml","z80":"text\/x-z80"}