いろんなフォントで「cofferdam」変換
Zen Old Minchocofferdam
Yusei Magiccofferdam
M PLUS 1cofferdam
Shippori Antiquecofferdam
Yuji Maicofferdam
Dela Gothic Onecofferdam
DotGothic16cofferdam
Train Onecofferdam
Hira Minchocofferdam
Potta Onecofferdam
Reggae Onecofferdam
Stickcofferdam
Zen Kurenaidocofferdam
Kosugi Marucofferdam
Rampart Onecofferdam
Hachi Maru Popcofferdam
New Tegomincofferdam
RocknRoll Onecofferdam
Kaisei Decolcofferdam
「cofferdam」をコピペできる装飾文字に変換（旧字体・丸囲みなど）
