Give customer No.106936's region name.
"Customer#000000055" is the name of the customer which refers to c_name; region name refers to r_name;
SELECT T3.r_name FROM nation AS T1 INNER JOIN customer AS T2 ON T1.n_nationkey = T2.c_nationkey INNER JOIN region AS T3 ON T1.n_regionkey = T3.r_regionkey WHERE T2.c_custkey = 106936