public static void main ( String [ ] args ) {
  Scanner in = new Scanner ( System . in ) ;
  String s1 = in . next ( ) ;
  String s2 = in . next ( ) ;
  String s = "zzzzzzzz" ;
  for ( int i = 0 ;
  i < s1 . length ( ) ;
  i ++ ) {
    for ( int j = 0 ;
    j < s2 . length ( ) ;
    j ++ ) {
      String ss = s1 . substring ( 0 , i + 1 ) + s2 . substring ( 0 , j + 1 ) ;
      s = min ( ss , s ) ;
    }
  }
  System . out . println ( s ) ;
}

public static void main ( String [ ] args ) { Scanner in = new Scanner ( System . in ) ; String s1 = in . next ( ) ; String s2 = in . next ( ) ; String s = " zzzzzzzz " ; for ( int i = 0 ; i < s1 . length ( ) ; i ++ ) { for ( int j = 0 ; j < s2 . length ( ) ; j ++ ) { String ss = s1 . substring ( 0 , i + 1 ) + s2 . substring ( 0 , j + 1 ) ; s = min ( ss , s ) ; } } System . out . println ( s ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (array_type element: (type_identifier) dimensions: (dimensions)) name: (identifier))) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (object_creation_expression type: (type_identifier) arguments: (argument_list (field_access object: (identifier) field: (identifier)))))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (string_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: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) 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: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) update: (update_expression (identifier)) body: (block (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (decimal_integer_literal) (binary_expression left: (identifier) right: (decimal_integer_literal)))) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (decimal_integer_literal) (binary_expression left: (identifier) right: (decimal_integer_literal))))))) (expression_statement (assignment_expression left: (identifier) right: (method_invocation name: (identifier) arguments: (argument_list (identifier) (identifier))))))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))