Repeated numbers

Enter numbers from 0 to 9 in different order, one in each line. You must enter the numbers till the same number repeats itself for the first time.

####Incoming data

Each line contains one of the numbers 0, 1, 2, ..., 9.

####Output data

Displays the number of reads before the first repetition.

Examples

Note

The solution of the problem can be modeled by the behavior of "Codey Rocky", which recognizes the colors of the cards marked with numbers 0..9.