#include<iostream>
#include<cstring>
using namespace std;
const int maxn=10000;
int sum[maxn+5];
void build(int p)
{
	int v;
	cin>>v;
	if(v==-1) return;
	sum[p]+=v;
	build(p-1);
	build(p+1);
}
bool init()
{
	int v;
	cin>>v;
	if(v==-1) return 0;
	memset(sum,0,sizeof(sum));
	int pos=maxn/2;
	sum[pos]=v;
	build(pos-1);
	build(pos+1);
}
int main()
{
	int kase=0;
	while(init())
	{
		int p=0;
		while(sum[p]==0) p++;
		cout<<"Case "<<++kase<<":\n"<<sum[p++];
		while(sum[p]!=0) cout<<' '<<sum[p++];
		cout<<'\n'<<endl;
	}
	return 0;
}