public static void main ( String [ ] args ) throws Exception {
  BufferedReader br = new BufferedReader ( new InputStreamReader ( System . in ) ) ;
  int t = Integer . parseInt ( br . readLine ( ) ) ;
  while ( ( t -- ) > 0 ) {
    PriorityQueue < Integer > heap = new PriorityQueue < Integer > ( Collections . reverseOrder ( ) ) ;
    String str = ( br . readLine ( ) ) ;
    for ( int i = 0 ;
    i < str . length ( ) ;
    i ++ ) {
      if ( str . charAt ( i ) == '1' ) {
        int curr = 0 ;
        while ( i < str . length ( ) && str . charAt ( i ) == '1' ) {
          i ++ ;
          curr ++ ;
        }
        heap . add ( curr ) ;
      }
    }
    int ans = 0 ;
    while ( ! heap . isEmpty ( ) ) {
      ans += heap . remove ( ) ;
      if ( heap . size ( ) > 0 ) {
        heap . remove ( ) ;
      }
    }
    System . out . println ( ans ) ;
  }
}

public static void main ( String [ ] args ) throws Exception { BufferedReader br = new BufferedReader ( new InputStreamReader ( System . in ) ) ; int t = Integer . parseInt ( br . readLine ( ) ) ; while ( ( t -- ) > 0 ) { PriorityQueue < Integer > heap = new PriorityQueue < Integer > ( Collections . reverseOrder ( ) ) ; String str = ( br . readLine ( ) ) ; for ( int i = 0 ; i < str . length ( ) ; i ++ ) { if ( str . charAt ( i ) == '1' ) { int curr = 0 ; while ( i < str . length ( ) && str . charAt ( i ) == '1' ) { i ++ ; curr ++ ; } heap . add ( curr ) ; } } int ans = 0 ; while ( ! heap . isEmpty ( ) ) { ans += heap . remove ( ) ; if ( heap . size ( ) > 0 ) { heap . remove ( ) ; } } System . out . println ( ans ) ; } }
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