いろんなフォントで「class_period」変換
Zen Old Minchoclass_period
Yusei Magicclass_period
M PLUS 1class_period
Shippori Antiqueclass_period
Yuji Maiclass_period
Dela Gothic Oneclass_period
DotGothic16class_period
Train Oneclass_period
Hira Minchoclass_period
Potta Oneclass_period
Reggae Oneclass_period
Stickclass_period
Zen Kurenaidoclass_period
Kosugi Maruclass_period
Rampart Oneclass_period
Hachi Maru Popclass_period
New Tegominclass_period
RocknRoll Oneclass_period
Kaisei Decolclass_period
「class_period」をコピペできる装飾文字に変換（旧字体・丸囲みなど）
