Example:

Initial State
JVIOTETSEGONMPYVQMWXLRDCIWYAZZGSKDFHKJULNRCQXUBPFBAH

Keystream
OEPUL MJZEG HGPGU VQHEN NJBWL OUKXC AZKMD GBVYX XRXAY PQWIX DQSBB CPPGU
SKLGH FNEQN BFNGF XPDGK PUNJF GGUAF JNAWJ UMMWH ISZCC OFYDJ ZZZNU XOSDD
PUFJK LVUYK JFLMU WXWOQ IVDYQ DSSQS NAMCK XMCHG CRIXX IDWXO MWQGT TSJHV
ZAXXX EKBXA ETWYJ BIKYF ISVPV ZXEJZ TBCWJ DTTMM KLFLB GNUBB GGQEP TLZRN
QGZZZ VZFSF PUVZL YFQDA QBIKD QEJOM OEULT SDNGP FWQEM LSMUC QSLOP XSHUV
HLIIJ IMPSI SNPIU LUNTF KLXCX MKAQW PZQYV MTSAA WEWKV PYDLD JVLNQ UXHKC
VFWYG RLQGI JGZZA NVOHI HUNBF YWFXS SQGYA IMEQJ CKQEN GJBZP WSXVF LRXYV
KFKPH LKRJQ YAELS RDIFM RCWRV GDKAC NNLOC ROGXE WECCP ZACLY OEJOY KICQT
TUWMT EANXY WVQQF VFUWU LZUFD HNKOR LEKEU YGMAZ LCHRF YHBAP GQPOI RWCBK
RWUWA NSPKQ AAUFY XRKUY ZEUPP YTROA ULAXO EKUYM IGXFZ AAGXC CONDT ESZKR