Example:

Initial State
JVIOTETSEGONMPYVQMWXLRDCIWYAZZGSKDFHKJULNRCQXUBPFBAH

Keystream
HWICDRTXTMOVVPYWZCSRMXVIPJNAGWZCGRBXFPABWHCSRWXMPVBPHNSGWZMS
VDPHNJGUZNSCMXVBPFNAGWQCWROXVPYFZASWDCHRHXSMEFZAGWKCFRAXWMCV
RYXTMTVPPBQHYSLEBZHSSDEFZKSUDNHCHXSBEFTATWPCBRYXZBSFDAHWJCLR
YGZBGFKAFWKCURCXROXVPYBIHDLMUVQPWQMYQZYGZKSFDKHUJNLCYXIBDFMA
VWPCQRSXDBHFJALWRAZSGEKBFFKAUWNCCCXXMOVVPYQNWGTPTBIHJLAAZZSG
DKHFJKLURNSCGXPBBFHALWUCNRHXJBLFRMZOGEKQFYKBUFNACUXNOCBXHOTV
TYISDEMMOVEMZOGEDZHGJKLFRKQUYNNCVXPBQFWASWECMRLXRNZGGIKJFAKL
UUNBCFXKOUVNYCIXDONVGYIQJYANZGGIKJFAJZLGRKLFUKSUENMCTXTBQFYA
PWBCHNZGGSKEFMKOUENQCGXKOFVKYULNUCSXEOMVOYENZGGSKEFMKOUERZQG
WKQFYKIUJNACLXUBMFVAPNZGGSKEFQKYUINJCRXZOGVKYFQKWUPNBCIXJOAV