public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  String s = sc . next ( ) ;
  int k = sc . nextInt ( ) ;
  if ( s . length ( ) < k ) {
    System . out . println ( 0 ) ;
    return ;
  }
  String [ ] words = new String [ s . length ( ) - k + 1 ] ;
  for ( int i = 0 ;
  i < words . length ;
  i ++ ) {
    words [ i ] = s . substring ( i , i + k ) ;
  }
  Arrays . sort ( words ) ;
  int output = words . length ;
  for ( int i = 1 ;
  i < words . length ;
  i ++ ) {
    if ( words [ i - 1 ] . equals ( words [ i ] ) ) output -- ;
  }
  System . out . println ( output ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; String s = sc . next ( ) ; int k = sc . nextInt ( ) ; if ( s . length ( ) < k ) { System . out . println ( 0 ) ; return ; } String [ ] words = new String [ s . length ( ) - k + 1 ] ; for ( int i = 0 ; i < words . length ; i ++ ) { words [ i ] = s . substring ( i , i + k ) ; } Arrays . sort ( words ) ; int output = words . length ; for ( int i = 1 ; i < words . length ; i ++ ) { if ( words [ i - 1 ] . equals ( words [ i ] ) ) output -- ; } System . out . println ( output ) ; }
(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: (integral_type) declarator: (variable_declarator name: (identifier) value: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)))) (if_statement condition: (parenthesized_expression (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) right: (identifier))) consequence: (block (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (decimal_integer_literal)))) (return_statement))) (local_variable_declaration type: (array_type element: (type_identifier) dimensions: (dimensions)) declarator: (variable_declarator name: (identifier) value: (array_creation_expression type: (type_identifier) dimensions: (dimensions_expr (binary_expression left: (binary_expression left: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list)) right: (identifier)) right: (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: (field_access object: (identifier) field: (identifier))) update: (update_expression (identifier)) body: (block (expression_statement (assignment_expression left: (array_access array: (identifier) index: (identifier)) right: (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier) (binary_expression left: (identifier) right: (identifier)))))))) (expression_statement (method_invocation object: (identifier) name: (identifier) arguments: (argument_list (identifier)))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (field_access object: (identifier) field: (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: (array_access array: (identifier) index: (binary_expression left: (identifier) right: (decimal_integer_literal))) name: (identifier) arguments: (argument_list (array_access array: (identifier) index: (identifier))))) consequence: (expression_statement (update_expression (identifier)))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (identifier))))))