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）
