#include<bits/stdc++.h> using namespace std; int m,n; string minn="999999999999999999999999999999999999999999999999999999999999999999",s; char a[40][40]; bool t(string x,string y){ if(x.size()<y.size())return 1; if(x.size()>y.size())return 0; for(int i=0;i<x.size();i++){ if(int(x[i]-'0')<int(y[i]-'0'))return 1; if(int(x[i]-'0')>int(y[i]-'0'))return 0; } return 0; } int main(){ cin>>n>>m;

for(int i=1;i<=n;i++){
	for(int j=1;j<=m;j++){
		cin>>a[i][j];
	}
}
for(int i=1;i<=n;i++){
	for(int j=1;j<=m;j++){
		s="";
		a[i][m+1]='#';
		a[i][0]='*';
		bool f=0;
		if(a[i][j]!='#'&&(a[i][j-1]<'0'||a[i][j-1]>'9')){
			f=1;
			for(int k=j;k<=m;k++){
				if(a[i][k]=='#')break;
				s+=a[i][k];
			}
		}
		if(s.size()>0)
		if(t(s,minn))minn=s;
	}
}
cout<<minn;
return 0;

}

#include<bits/stdc++.h> using namespace std; long long n,m,mink=25; char ch; string s,minn="zzzzzzzzzzzzzzzz"; int main() { cin>>n>>m; for(int i=1;i<=n;i++) { s=""; for(int j=1;j<=m;j++) { cin>>ch; if(ch=='#') { if(s!=""&&(s.size()==mink&&s<minn||s.size()<mink)) { mink=s.size(); minn=s; } s="";//空字符串 } else s+=ch; }//一次判断字符串 if(s!=""&&(s.size()==mink&&s<minn||s.size()<mink)) { mink=s.size(); minn=s; }//二次判断字符串 } cout<<minn; return 0; }