public static void main ( String [ ] args ) {
  Scanner input = new Scanner ( System . in ) ;
  long n = input . nextLong ( ) ;
  long a = 1 , b = 1 , mod = ( long ) ( 1E9 ) + 7 ;
  for ( int i = 0 ;
  i < 3 * n ;
  i ++ ) {
    a = ( a * 3 ) % mod ;
  }
  for ( int i = 0 ;
  i < n ;
  i ++ ) b = ( b * 7 ) % mod ;
  System . out . println ( ( a - b + mod ) % mod ) ;
}

public static void main ( String [ ] args ) { Scanner input = new Scanner ( System . in ) ; long n = input . nextLong ( ) ; long a = 1 , b = 1 , mod = ( long ) ( 1E9 ) + 7 ; for ( int i = 0 ; i < 3 * n ; i ++ ) { a = ( a * 3 ) % mod ; } for ( int i = 0 ; i < n ; i ++ ) b = ( b * 7 ) % mod ; System . out . println ( ( a - b + mod ) % mod ) ; }
(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: (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: (decimal_integer_literal)) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal)) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (cast_expression type: (integral_type) value: (parenthesized_expression (decimal_floating_point_literal))) 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: (binary_expression left: (decimal_integer_literal) right: (identifier))) update: (update_expression (identifier)) body: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (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: (identifier)) update: (update_expression (identifier)) body: (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (identifier))))) (expression_statement (method_invocation object: (field_access object: (identifier) field: (identifier)) name: (identifier) arguments: (argument_list (binary_expression left: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (identifier)) right: (identifier))) right: (identifier)))))))