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ac#include<stdio.h>
#include<string.h>
#include<algorithm>
using namespace std;
struct node
{
int a;
char s[1000];
}p[1000];
int cmp(node c,node b)
{
return c.a<b.a;
}
int main()
{
int m,n;
while(~scanf("%d%d",&n,&m))
{
for(int i=0;i<1000;i++)
p[i].a=0;
for(int i=0;i<m;i++)
scanf("%s",p[i].s);
for(int k=0;k<m;k++)
for(int i=0;i<n;i++)
for(int j=i+1;j<n;j++)
if(p[k].s[i]>p[k].s[j])
p[k].a++;
sort(p,p+m,cmp);
for(int i=0;i<m;i++)
printf("%s\n",p[i].s);
}
}
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