Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_222771_1 (iso_3166_2_codes VARCHAR, english_short_name__upper_lower_case_ VARCHAR)

### Question ###
What is the ISO for South Sudan?

### Accurate SQL ###

SELECT iso_3166_2_codes FROM table_222771_1 WHERE english_short_name__upper_lower_case_ = "South Sudan"