#include<bits/stdc++.h>
using namespace std;

int n,m,i,j;

int main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cout.tie(NULL);

freopen ("note.in","r",stdin);
freopen ("note.out","w",stdout);

cin>>n>>m;
char a[n+1][m+1];
bool ans,l[n+1][m+1],u[n+1][m+1];

for(i=1;i<=n;i++){
    for(j=1;j<=m;j++){
        cin>>a[i][j];
        if(a[i][j]=='L' || a[i][j]=='0'){
            ans=1;
            if(a[i][j-1]=='0' && l[i][j-1]==1) ans=0;
            if(a[i][j-1]=='1' && u[i][j-1]==1) ans=0;
            if(a[i-1][j]=='0' && u[i-1][j]==1) ans=0;
            if(a[i-1][j]=='1' && l[i-1][j]==1) ans=0;

            if(ans==1) u[i][j]=l[i][j]=1;
            if(l[i][j-1]==1) l[i][j]=1;
            if(u[i-1][j]==1) u[i][j]=1;

            if(a[i][j]=='L'){
                if(ans==1) cout<<"K";
                else cout<<"L";
                return 0;
            }
        }
        else{
            if(l[i][j-1]==1) l[i][j]=1;
            if(u[i-1][j]==1) u[i][j]=1;
        }
    }
}









return 0;
}