public static void main ( String [ ] args ) {
  COMinit ( ) ;
  Scanner sc = new Scanner ( System . in ) ;
  int n = sc . nextInt ( ) ;
  int k = sc . nextInt ( ) ;
  long kotae = COM ( n , 1 ) * COM ( k - 1 , 0 ) ;
  for ( int i = 2 ;
  i <= Math . min ( n , k ) ;
  i ++ ) {
    kotae += COM ( n , i ) * COM ( k - 1 , i - 1 ) % MOD ;
    kotae %= MOD ;
  }
  System . out . println ( kotae ) ;
}

public static void main ( String [ ] args ) { COMinit ( ) ; Scanner sc = new Scanner ( System . in ) ; int n = sc . nextInt ( ) ; int k = sc . nextInt ( ) ; long kotae = COM ( n , 1 ) * COM ( k - 1 , 0 ) ; for ( int i = 2 ; i <= Math . min ( n , k ) ; i ++ ) { kotae += COM ( n , i ) * COM ( k - 1 , i - 1 ) % MOD ; kotae %= MOD ; } System . out . println ( kotae ) ; }
(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 (expression_statement (method_invocation 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 (field_access object: (identifier) field: (identifier)))))) (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: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (method_invocation name: (identifier) arguments: (argument_list (identifier) (decimal_integer_literal))) right: (method_invocation name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal)) (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 (identifier) (identifier)))) update: (update_expression (identifier)) body: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (binary_expression left: (method_invocation name: (identifier) arguments: (argument_list (identifier) (identifier))) right: (method_invocation name: (identifier) arguments: (argument_list (binary_expression left: (identifier) right: (decimal_integer_literal)) (binary_expression left: (identifier) right: (decimal_integer_literal))))) right: (identifier)))) (expression_statement (assignment_expression left: (identifier) right: (identifier))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))