いろんなフォントで「vent_off」変換
Zen Old Minchovent_off
Yusei Magicvent_off
M PLUS 1vent_off
Shippori Antiquevent_off
Yuji Maivent_off
Dela Gothic Onevent_off
DotGothic16vent_off
Train Onevent_off
Hira Minchovent_off
Potta Onevent_off
Reggae Onevent_off
Stickvent_off
Zen Kurenaidovent_off
Kosugi Maruvent_off
Rampart Onevent_off
Hachi Maru Popvent_off
New Tegominvent_off
RocknRoll Onevent_off
Kaisei Decolvent_off
「vent_off」をコピペできる装飾文字に変換（旧字体・丸囲みなど）
