text = ("GHDG XLBHSFH IHBB LS YKH CLGGBH TI D OTWG TZY OHSY DBB BLJKYX YKH\
ILWH BHDUHG ZU LS EBDFA XCTAHX DXKHX DSG FLSGHWX OHWH LS YKH\
HQHX TI YKH GODWNHX DSG YKH OTTG ODX ILBBHG DJDLS OLYK YKHLW\
FBDCTZW DSG YKHLW FWLHX ELBET ITZSG KLCXHBI WZSSLSJ WTZSG DSG\
WTZSG DX KH YKTZJKY DSG FDBBLSJ DSG FDBBLSJ GTWL STWL TWL TLS\
JBTLS ILBL ALBL ETCEZW ETIZW GODBLS EDBLS YKTWLS TDAHSXKLHBG OKLBH\
UHTUBH KH FTZBG STY XHH TW IHHB OHWH GTLSJ YKH XDCH DBB WTZSG\
KLC OLYK DS TFFDXLTSDB ELBET YKWTOS LS EZY YKH FWLHX TI YKH TYKHWX\
JTY XYHDGLBQ IZWYKHW DSG IDLSYHW DSG YKTZJK DIYHW D OKLBH LY\
XHHCHG YT KLC YKHQ FKDSJHG YT QHBBX DSG FWLHX ITW KHBU LS YKH\
GLXYDSFH DBB STLXH DY BDXY GLHG WLJKY DODQ DSG KH ODX BHIY DBTSH\
LS FTCUBHYH XLBHSFH DSG GDWASHXX")
 
text = text.replace('H', 'e')
print text

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