いろんなフォントで「back+building」変換
Zen Old Minchoback+building
Yusei Magicback+building
M PLUS 1back+building
Shippori Antiqueback+building
Yuji Maiback+building
Dela Gothic Oneback+building
DotGothic16back+building
Train Oneback+building
Hira Minchoback+building
Potta Oneback+building
Reggae Oneback+building
Stickback+building
Zen Kurenaidoback+building
Kosugi Maruback+building
Rampart Oneback+building
Hachi Maru Popback+building
New Tegominback+building
RocknRoll Oneback+building
Kaisei Decolback+building
「back+building」をコピペできる装飾文字に変換（旧字体・丸囲みなど）
