このタイトルにも注目。それと、下の文章・・・文字列群は等幅フォントで、テキストエディタで見るといいでしょう。文字列の並びに、規則性を見出して“いじって”みましょう。
SSSSS4SSS444444444444SS44444444444444444SSSSS4S444
4444ODDD%DDDD8OO44444444444444SS4444444444OD%%%%$$
$DDDD%D4444444444444SS44444444ODDDDOS4CSDDDD%%%DS4
4444444444444444444D%%%%O4C1;:;-!11!?DD44444444444
44444444O$%%%%D4X?-:......:X%OC44444444444444444D%
%%%D8X?I;..:....:IDDC4444444444444444CD%%%%DD4==XI
-:;!-;;-DDC4444444444444444CS%%%DD%DSX=8?.18S1IID8
C4444444444444444CO%%%DCCX?!.CX.:!I-;;844444444444
4444444CO%%%D4X-:.:CX......:!IS4444444444444444CS%
%DD%SX?COOC-I!?-:-.?S444444444444444444%%%D%S44O%D
OSO!!CCI-S4444444444444444444CO%%D4D%%D8S8%D4;-IC4
444444444C4444444CCCO%%%DSD%S=I!?=4!-C4C44C44444CC
44444CCCSD%%D%%84S8C=1-:I=C4CCCCCCCCCCCC44CCCS8%%%
%%%%%%DC?I-::?COOOO8SCC44CCCCCC44OD%%%%%%%%%%%%%8O
O4SSC8OSSD%OSOOS4CCCO8DDDDDD%%%%%%%%%%%%%DOX4DDSSD
%OS88SOS44888O8888D%%%%%%%%%DDOS?X88D8S%DS8DOOOSOS
OOOOODD88D%%%%D8O88O41?D88ODO%8O%ODOO8OODDOOOODDO8
8D%%8S==CX1?D888OD8DODD8DOD88O8DD8OSODD888%%%SXXXX
XD8ODO88DD8D8D8D8D8O8O8DDOSOD888D%%%8SC4DDO8DOD8%8
%8D8DDDD888888DDOS8D8DD%%%D8DDDOOD88DD%8%D%D%D%88D
