#include<bits/stdc++.h> #define int long long using namespace std; namespace Fast{ inline int fr(){ register int x = 0,f = 1; static char c = getchar(); while (c < '0' || c > '9'){ if (c == '-'){ f = -1; } c = getchar(); } while (c >= '0' && c <= '9'){ x = (x << 1) + (x << 3) + (c ^ 48); c = getchar(); } return x * f; } inline void CCF(int opt){ ios::sync_with_stdio(false); if (opt == 0){ cout.tie(0); return ; } if (opt >= 1){ cin.tie(0); } if (opt >= 2){ cout.tie(0); } } } using namespace Fast; string s[505]; signed main(){ //freopen(".in","r",stdin); //freopen(".out","w",stdout); CCF(2); int n,m; n = fr(),m = fr(); for (int i = 1;i <= n;i++){ getline(cin,s[i]); } sort(s + 1,s + n + 1); for (int i = 1;i <= n;i++){ cout<<s[i]<<'\n'; } return 0; }