いろんなフォントで「billboard」変換
Zen Old Minchobillboard
Yusei Magicbillboard
M PLUS 1billboard
Shippori Antiquebillboard
Yuji Maibillboard
Dela Gothic Onebillboard
DotGothic16billboard
Train Onebillboard
Hira Minchobillboard
Potta Onebillboard
Reggae Onebillboard
Stickbillboard
Zen Kurenaidobillboard
Kosugi Marubillboard
Rampart Onebillboard
Hachi Maru Popbillboard
New Tegominbillboard
RocknRoll Onebillboard
Kaisei Decolbillboard
「billboard」をコピペできる装飾文字に変換（旧字体・丸囲みなど）
