#import<cstdio>
int main(int h,char t[9999999]){
    int w,p,i=0;
    scanf("%d%d",&h,&w);
    for(;i<h;scanf("%s",t+i++*w));
    for(i=0;t[i];i++)if(t[i]=='R')p=i;
    while(t[(p+=(++p%w)?w:0)%=i]=='.');
    if(t[p]=='R')printf("loop");
    else printf("%d %d",p/w?p/w:h,p%w?p%w:w);
}