public static void main ( String [ ] args ) {
  BufferedReader bf = new BufferedReader ( new InputStreamReader ( System . in ) ) ;
  int a , b , c , d ;
  try {
    a = Integer . parseInt ( bf . readLine ( ) ) ;
    b = Integer . parseInt ( bf . readLine ( ) ) ;
    c = Integer . parseInt ( bf . readLine ( ) ) ;
    d = Integer . parseInt ( bf . readLine ( ) ) ;
    System . out . println ( Math . min ( a , b ) + Math . min ( c , d ) ) ;
  }
  catch ( Exception e ) {
  }
}

public static void main ( String [ ] args ) { BufferedReader bf = new BufferedReader ( new InputStreamReader ( System . in ) ) ; int a , b , c , d ; try { a = Integer . parseInt ( bf . readLine ( ) ) ; b = Integer . parseInt ( bf . readLine ( ) ) ; c = Integer . parseInt ( bf . readLine ( ) ) ; d = Integer . parseInt ( bf . readLine ( ) ) ; System . out . println ( Math . min ( a , b ) + Math . min ( c , d ) ) ; } catch ( Exception e ) { } }
(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 (object_creation_expression type: (type_identifier) arguments: (argument_list (field_access object: (identifier) field: (identifier)))))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier)) declarator: (variable_declarator name: (identifier)) declarator: (variable_declarator name: (identifier)) declarator: (variable_declarator name: (identifier))) (try_statement body: (block (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))) (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))) (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))) (expression_statement (assignment_expression left: (identifier) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (identifier))) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (identifier)))))))) (catch_clause (catch_formal_parameter (catch_type (type_identifier)) name: (identifier)) body: (block)))))