public static void main ( String [ ] args ) throws IOException {
  BufferedReader br = new BufferedReader ( new InputStreamReader ( System . in ) ) ;
  String a = br . readLine ( ) ;
  String [ ] b = a . split ( " " ) ;
  int N = Integer . parseInt ( b [ 0 ] ) ;
  int L = Integer . parseInt ( b [ 1 ] ) ;
  amida = new int [ N ] ;
  for ( int i = 0 ;
  i < N ;
  i ++ ) {
    amida [ i ] = i + 1 ;
  }
  for ( int i = 0 ;
  i < L ;
  i ++ ) {
    String s = br . readLine ( ) ;
    for ( int j = 0 ;
    j < N - 1 ;
    j ++ ) {
      if ( s . charAt ( 2 * j + 1 ) == '-' ) {
        swap ( j ) ;
      }
    }
  }
  String s = br . readLine ( ) ;
  for ( int i = 0 ;
  i < N ;
  i ++ ) {
    if ( s . charAt ( 2 * i ) == 'o' ) {
      pl ( amida [ i ] ) ;
      break ;
    }
  }
}

public static void main ( String [ ] args ) throws IOException { BufferedReader br = new BufferedReader ( new InputStreamReader ( System . in ) ) ; String a = br . readLine ( ) ; String [ ] b = a . split ( " ▁ " ) ; int N = Integer . parseInt ( b [ 0 ] ) ; int L = Integer . parseInt ( b [ 1 ] ) ; amida = new int [ N ] ; for ( int i = 0 ; i < N ; i ++ ) { amida [ i ] = i + 1 ; } for ( int i = 0 ; i < L ; i ++ ) { String s = br . readLine ( ) ; for ( int j = 0 ; j < N - 1 ; j ++ ) { if ( s . charAt ( 2 * j + 1 ) == ' - ' ) { swap ( j ) ; } } } String s = br . readLine ( ) ; for ( int i = 0 ; i < N ; i ++ ) { if ( s . charAt ( 2 * i ) == ' o ' ) { pl ( amida [ i ] ) ; break ; } } }
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