says to input index 1 - 0, yet when I input index 0 doesn't accept as valid input.  <!--session: 1680252478214-e2729517-1448-478e-9721-a6b35ce68d37--> <!--Version: Web v3.4.7-->
says to input index 1 - 0, yet when I input index 0 doesn't accept as valid input.