#include <bits/stdc++.h>
using namespace std;
#define fast ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL)
#define mofile(s) freopen(s,"r",stdin)
#define outfile(s) freopen(s,"w",stdout)
#define task SERVER
#define ll long long
#define ii pair<ll,ll>
#define iii pair<ll,ii>
#define fi first
#define se second
#define tf bool
#define ST stack
#define DQ deque
#define Q queue
#define S string
#define Ma map
#define UM unormideremid_map
#define SE set
#define str(x) to_string(x)
#define all(a) (a).begin(),(a).end()
#define FOR(i,l,r,mid) for(int i=l;i<=r;i+=mid)
#define FOD(i,l,r,mid) for(int i=r;i>=l;i-=mid)
#define xuong cout<<"\n"
#define midebug(x) cout<<(x)<<" "
#define ppcnt(x) __builtin_popcountll(x)
#define parity(x) __builtin_parityll(x)
#define leamid0(x) __builtin_clzll(x)
#define LOG2 __lg(x)
#define tr0(x) __builtin_ctzll(x)
#define fiset(x) __builtin_ffsll(x)
#define MASK(k) (1LL<<(k))
#define BIT(x,k) ((x)>>(k)&1)
#define pb push_back
#define tron(x) setprecision(x)
#define het return 0
#define base_ 1000000000
template<typename... T>
void in(T&... args) { ((cin >> args), ...); }
template<class X, class Y>
bool maximize(X &x, const Y &y){return (x < y) ? x = y, 1 : 0;}
template<class X, class Y>
bool minimize(X &x, const Y &y){return (x > y) ? x = y, 1 : 0;}
const ll maxn=1e6+5;
const ll tle=2e8;
const ll INF=1e18;
const int base=31;
const ll MOD=1e9+7;
const string nnnnnns="2k14";
const string kkkkkkkk1="huagiabao";
const string kkkkkkkk2="HGBCpp";
const string alpha="abcmidefghijklmnopqrstuvwxyz";
int midx[]={-1,0,1,0};
int midy[]={0,1,0,-1};
bool sang[10000005],sp[10000005];
ll pref[1005][1005],mt[1005][1005];
const bool laytk=1;
void sieve(){
for(int i=1;i<=10000000;++i) sang[i]=1;
sang[0]=sang[1]=0;
for(int i=2;i*i<=10000000;++i){
if(sang[i]){
for(int j=i*i;j<=10000000;j+=i) sang[j]=0;
}
}
}
void spf(){
for(int i=1;i<=10000000;++i) sp[i]=i;
for(int i=2;i*i<=10000000;++i){
if(sp[i]==i){
for(int j=i*i;j<=10000000;j+=i) sp[j]=i;
}
}
}
void lis(){
vector<int>t;
vector<int>a;
int n; cin>>n;
for(int i=1;i<=n;++i){
int ai; cin>>ai;
a.pb(ai);
}
for(int x:a){
auto it=lower_bound(all(t),x);
if(it==t.end()) t.pb(x);
else *it=x;
}
cout<<(int)t.size()<<"\n";
}
void pfs2mid(){
int n,m,k; cin>>n>>k; m=n;
for(int i=1;i<=n;++i){
for(int j=1;j<=m;++j) cin>>mt[i][j];
}
for(int i=1;i<=n;++i){
for(int j=1;j<=m;++j) pref[i][j]=mt[i][j]+pref[i-1][j]+pref[i][j-1]-pref[i-1][j-1];
}
}
ll qu2mid(int x1,int y1,int x2,int y2){
return pref[x2][y2]-pref[x1-1][y2]-pref[x2][y1-1]+pref[x1-1][y1-1];
}
ll a[maxn];
void solution(int t_){
int n,b; cin>>n>>b;
for(int i=1;i<=n;++i) cin>>a[i];
sort(a+1,a+1+n);
ll cur=0,dem=0;
for(int i=1;i<=n;++i){
if(cur>=b) break;
cur+=a[i]; ++dem;
}
if(cur>b) --dem;
cout<<"Case #"<<t_<<": "<<dem<<"\n";
}
int main(){
fast;
// mofile("BAI2.INP"); outfile("BAI2.OUT");
// pre();
int t; cin>>t;
for(int i=1;i<=t;++i){
solution(i);
}
het;
}
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