いろんなフォントで「blank_shell」変換
Zen Old Minchoblank_shell
Yusei Magicblank_shell
M PLUS 1blank_shell
Shippori Antiqueblank_shell
Yuji Maiblank_shell
Dela Gothic Oneblank_shell
DotGothic16blank_shell
Train Oneblank_shell
Hira Minchoblank_shell
Potta Oneblank_shell
Reggae Oneblank_shell
Stickblank_shell
Zen Kurenaidoblank_shell
Kosugi Marublank_shell
Rampart Oneblank_shell
Hachi Maru Popblank_shell
New Tegominblank_shell
RocknRoll Oneblank_shell
Kaisei Decolblank_shell
「blank_shell」をコピペできる装飾文字に変換（旧字体・丸囲みなど）
