AAI ATC Junior Executive 27 Dec 2023 Shift 2 Paper

Consider the string given below made up of number and symbol. If all the 1 's are replaced by 3 and the symbol '!' replaced by symbol '#', then which digit will be at 5^th position from the left end in the newly formed string?
2 2 @ ! 1 2 ! 1 1 2 1 ! @ 1 1 @ ! ! @ 2 2 @ @ 2 1