CREATE TABLE table_18278508_4 (main_contestant VARCHAR(255), position VARCHAR(255), co_contestant__yaar_vs_pyaar_ VARCHAR(255))
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"