public static void main ( String args [ ] ) {
  Scanner sc = new Scanner ( System . in ) ;
  String a = sc . next ( ) ;
  String b = sc . next ( ) ;
  StringBuilder ab = new StringBuilder ( ) ;
  ab . append ( a . charAt ( 0 ) ) ;
  for ( int i = 1 ;
  i < a . length ( ) ;
  i ++ ) {
    if ( a . charAt ( i ) < b . charAt ( 0 ) ) ab . append ( a . charAt ( i ) ) ;
    else break ;
  }
  ab . append ( b . charAt ( 0 ) ) ;
  System . out . println ( ab . toString ( ) ) ;
}

public static void main ( String args [ ] ) { Scanner sc = new Scanner ( System . in ) ; String a = sc . next ( ) ; String b = sc . next ( ) ; StringBuilder ab = new StringBuilder ( ) ; ab . append ( a . charAt ( 0 ) ) ; for ( int i = 1 ; i < a . length ( ) ; i ++ ) { if ( a . charAt ( i ) < b . charAt ( 0 ) ) ab . append ( a . charAt ( i ) ) ; else break ; } ab . append ( b . charAt ( 0 ) ) ; System . out . println ( ab . toString ( ) ) ; }
(method_declaration (modifiers) type: (void_type) name: (identifier) parameters: (formal_parameters (formal_parameter type: (type_identifier) name: (identifier) dimensions: (dimensions))) 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: (object_creation_expression type: (type_identifier) arguments: (argument_list)))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (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: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list))) update: (update_expression (identifier)) body: (block (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier))) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (decimal_integer_literal))))) consequence: (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))))) alternative: (break_statement)))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (decimal_integer_literal)))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))))