int main(){
char nilai[15];
scanf("%d %d",&r,&c);
string cari="";
string set ="";
int run = 1;
for(int i=0; i<c; i++){
cari+="1";
set+="0";
}
for(int i=0;i<r;i++){
scanf("%s",nilai);
string isi = nilai;
if(isi == cari){
run =1;
isi = set;
if(i > besar) besar = i;
}
data.pb(isi);
}
int stat= 0;
int atas;
while(run){
atas=-1;
for(int i=0;i<r-1;i++){
if(data[i] != cari && data[i] != set){
atas=i;
}
}
if(data[r-1] == set && atas!=-1){
stat = 1;
besar = r-1;
}
runtuhkan();
stat=0;
besar=0;
for(int i=0;i<r;i++){
if(data[i] == cari){
stat=1;
data[i] = set;
if(i>besar){
besar=i;
break;
}
}
}
if(data[r-1] == set && atas!=-1){
stat = 1;
besar = r-1;
}
if(stat !=1) run=0;
}
for(int i=0; i <r;i++){
printf("%s\n",data[i].c_str());
}
}
