#include <iostream>
#include <cstdio>
#define INF 0x3f3f3f3f
using namespace std;
const int maxn=10000;
int graph[maxn][maxn];
int n,m;
void init()
{
for(int i=1; i<=n; ++i)
{
for(int j=1; j<=n; ++j)
{
if(i==j)
graph[i][j]=0;
else
graph[i][j]=INF;
}
}
}
int main()
{
cin>>n>>m;
init();
for(int i=0; i<m; ++i)
{
int a,b;
cin>>a>>b;
graph[a][b]=1;
graph[b][a]=1;
}
for(int k=1; k<=n; ++k)
{
for(int i=1; i<=n; ++i)
{
for(int j=1; j<=n; ++j)
{
if(graph[i][j]>graph[i][k]+graph[k][j])
{
graph[i][j]=graph[i][k]+graph[k][j];
}
}
}
}
for(int j=1; j<=n; ++j)
{
int cnt=1;
for(int i=1; i<=n; ++i)
{
if(graph[i][j]<=6&&i!=j)
cnt++;
}
printf("%d: %.2f%%\n",j,1.0*cnt*100/n);
}
return 0;
}
