#include<bits/stdc++.h>
using namespace std;
#define int long long
#define uint unsigned long long
#define speed ios::sync_with_stdio(0),cin.tie(0), cout.tie(0);
int n;
signed main() {
	speed
	cin>>n;
	for(int i=1;i<=n;i++){
		string a;
		int s[21],k=0;
		memset(s,0,sizeof(s));
		cin>>a;
		cout<<"Case #"<<i<<": ";
		for(int j=0;j<a.size();j++)s[k++]=a[j]-'0';
		if(next_permutation(s,s+k))for(int j=0;j<k;j++)cout<<s[j];
		else{
			int ans=0;
			for(;s[ans]=='0';ans++);
			cout<<s[ans];
			for(int j=0;j<=ans;j++)cout<<'0';
			for(int j=ans+1;j<=k;j++)cout<<s[j];
		}
		cout<<'\n';
	}
	return 0;
}

样例都对