public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int n = sc . nextInt ( ) ;
  int [ ] [ ] arr = new int [ n ] [ 2 ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    for ( int j = 0 ;
    j < 2 ;
    j ++ ) {
      arr [ i ] [ j ] = sc . nextInt ( ) ;
    }
  }
  int m = sc . nextInt ( ) ;
  int [ ] [ ] arr1 = new int [ m ] [ 2 ] ;
  for ( int i = 0 ;
  i < m ;
  i ++ ) {
    for ( int j = 0 ;
    j < 2 ;
    j ++ ) {
      arr1 [ i ] [ j ] = sc . nextInt ( ) ;
    }
  }
  Map < Integer , List < Integer >> map = new HashMap < > ( ) ;
  for ( int i = 0 ;
  i < arr . length ;
  i ++ ) {
    List < Integer > list = new ArrayList < > ( ) ;
    list . add ( arr [ i ] [ 1 ] ) ;
    map . put ( arr [ i ] [ 0 ] , list ) ;
  }
  for ( int i = 0 ;
  i < arr1 . length ;
  i ++ ) {
    if ( map . containsKey ( arr1 [ i ] [ 0 ] ) ) {
      List < Integer > list = map . get ( arr1 [ i ] [ 0 ] ) ;
      list . add ( arr1 [ i ] [ 1 ] ) ;
      map . put ( arr1 [ i ] [ 0 ] , list ) ;
    }
    else {
      List < Integer > list = new ArrayList < > ( ) ;
      list . add ( arr1 [ i ] [ 1 ] ) ;
      map . put ( arr1 [ i ] [ 0 ] , list ) ;
    }
  };
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int n = sc . nextInt ( ) ; int [ ] [ ] arr = new int [ n ] [ 2 ] ; for ( int i = 0 ; i < n ; i ++ ) { for ( int j = 0 ; j < 2 ; j ++ ) { arr [ i ] [ j ] = sc . nextInt ( ) ; } } int m = sc . nextInt ( ) ; int [ ] [ ] arr1 = new int [ m ] [ 2 ] ; for ( int i = 0 ; i < m ; i ++ ) { for ( int j = 0 ; j < 2 ; j ++ ) { arr1 [ i ] [ j ] = sc . nextInt ( ) ; } } Map < Integer , List < Integer > > map = new HashMap < > ( ) ; for ( int i = 0 ; i < arr . length ; i ++ ) { List < Integer > list = new ArrayList < > ( ) ; list . add ( arr [ i ] [ 1 ] ) ; map . put ( arr [ i ] [ 0 ] , list ) ; } for ( int i = 0 ; i < arr1 . length ; i ++ ) { if ( map . containsKey ( arr1 [ i ] [ 0 ] ) ) { List < Integer > list = map . get ( arr1 [ i ] [ 0 ] ) ; list . add ( arr1 [ i ] [ 1 ] ) ; map . put ( arr1 [ i ] [ 0 ] , list ) ; } else { List < Integer > list = new ArrayList < > ( ) ; list . add ( arr1 [ i ] [ 1 ] ) ; map . put ( arr1 [ i ] [ 0 ] , list ) ; } } ; }
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(local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (decimal_integer_literal)) update: (update_expression (identifier)) body: (block (expression_statement (assignment_expression left: (array_access array: (array_access array: (identifier) index: (identifier)) index: (identifier)) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (array_type element: (integral_type) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (array_creation_expression type: (integral_type) dimensions: (dimensions_expr (identifier)) dimensions: (dimensions_expr (decimal_integer_literal))))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (decimal_integer_literal)) update: (update_expression (identifier)) body: (block (expression_statement (assignment_expression left: (array_access array: (array_access array: (identifier) index: (identifier)) index: (identifier)) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))))) (local_variable_declaration type: (generic_type (type_identifier) (type_arguments (type_identifier) (generic_type (type_identifier) (type_arguments (type_identifier))))) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (generic_type (type_identifier) (type_arguments)) arguments: (argument_list)))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (field_access object: (identifier) field: (identifier))) update: (update_expression (identifier)) body: (block (local_variable_declaration type: (generic_type (type_identifier) (type_arguments (type_identifier))) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (generic_type (type_identifier) (type_arguments)) arguments: (argument_list)))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (array_access array: (identifier) index: (identifier)) index: (decimal_integer_literal))))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (array_access array: (identifier) index: (identifier)) index: (decimal_integer_literal)) (identifier)))))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (field_access object: (identifier) field: (identifier))) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (array_access array: (identifier) index: (identifier)) index: (decimal_integer_literal))))) consequence: (block (local_variable_declaration type: (generic_type (type_identifier) (type_arguments (type_identifier))) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (array_access array: (identifier) index: (identifier)) index: (decimal_integer_literal)))))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (array_access array: (identifier) index: (identifier)) index: (decimal_integer_literal))))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (array_access array: (identifier) index: (identifier)) index: (decimal_integer_literal)) (identifier))))) alternative: (block (local_variable_declaration type: (generic_type (type_identifier) (type_arguments (type_identifier))) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (generic_type (type_identifier) (type_arguments)) arguments: (argument_list)))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (array_access array: (identifier) index: (identifier)) index: (decimal_integer_literal))))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (array_access array: (array_access array: (identifier) index: (identifier)) index: (decimal_integer_literal)) (identifier))))))))))