static String minString ( int n ) {
  int ans = n / 26 ;
  String res = "" ;
  while ( ans -- != 0 ) {
    res = res + "z" ;
  }
  if ( n % 26 != 0 ) {
    res = res + ( char ) ( ( n % 26 ) + 96 ) ;
  }
  return res ;
}

static String minString ( int n ) { int ans = n / 26 ; String res = " " ; while ( ans -- != 0 ) { res = res + " z " ; } if ( n % 26 != 0 ) { res = res + ( char ) ( ( n % 26 ) + 96 ) ; } return res ; }
(method_declaration (modifiers) type: (type_identifier) name: (identifier) parameters: (formal_parameters (formal_parameter type: (integral_type) name: (identifier))) body: (block (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (binary_expression left: (identifier) right: (decimal_integer_literal)))) (local_variable_declaration type: (type_identifier) declarator: (variable_declarator name: (identifier) value: (string_literal))) (while_statement condition: (parenthesized_expression (binary_expression left: (update_expression (identifier)) right: (decimal_integer_literal))) body: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (string_literal)))))) (if_statement condition: (parenthesized_expression (binary_expression left: (binary_expression left: (identifier) right: (decimal_integer_literal)) right: (decimal_integer_literal))) consequence: (block (expression_statement (assignment_expression left: (identifier) right: (binary_expression left: (identifier) right: (cast_expression type: (integral_type) value: (parenthesized_expression (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (decimal_integer_literal))) right: (decimal_integer_literal))))))))) (return_statement (identifier))))