#include<iostream>

#include<cstring>

using namespace std;

int ju[][]=

{{,,,,,,,,},

{,,,,,,,,},

{,,,,,,,,},

{,,,,,,,,},

{,,,,,,,,},

{,,,,,,,,},

{,,,,,,,,},

{,,,,,,,,},

{,,,,,,,,}};

int a[],b[],s[],head,tail;

void print(int d)

{

    cout << char(a[d]+);

    while(b[d]){

        d=b[d];

        cout << "--" << char(a[d]+);

    }

    cout << endl;

}

void bfs()

{

    int i;

    head=;tail=;         //tail依次记录每个节点

    a[]=;b[]=;s[]=;  //a数组记录每个节点上城市,b数组记录上一个城市的节点,s记录走过的城市

    do{

        head++;

        for(i=;i<=;i++){

            if(ju[a[head]][i]== && s[i]==){

                tail++;

                a[tail]=i;

                b[tail]=head;

                s[i]=;

                if(i==) {

                    print(tail);

                    return;

                }

            }

        }

    }while(head<tail);

}

int main()

{

    memset(s,,sizeof(s));

    bfs();

    return ;

}