Testing Reductions Test LeftmostStartsWith test1 SUCH0 test2 S test3 null test4 Salamander test5 Swan Test LeftmostStartsWithIndex test1 5042 test2 18 test3 -1 test4 99997 test5 5042 Test SecondLeftmost test1 SUCH1 test2 S test3 null test4 null test5 Sloth Test KthLeftmost with k = 1 test1 SUCH0 test2 S test3 null test4 Salamander test5 Swan Test KthLeftmost with k = 2 test1 SUCH1 test2 S test3 null test4 null test5 Sloth Test KthLeftmost with k = 7 test1 SUCH6 test2 S test3 null test4 null test5 null Test KthLeftmost with k = 19 test1 SUCH18 test2 S test3 null test4 null test5 null Test KthLeftmost with k = 150 test1 null test2 S test3 null test4 null test5 null