Table schema:
CREATE TABLE table_18278508_4 (main_contestant VARCHAR, position VARCHAR, co_contestant__yaar_vs_pyaar_ VARCHAR)

Question: Name the total number of main contestants for safe position for tina parekh
SQL: SELECT COUNT(main_contestant) FROM table_18278508_4 WHERE position = "Safe" AND co_contestant__yaar_vs_pyaar_ = "Tina Parekh"