{"problem":{"name":"Signboard","description":{"content":"CODE FESTIVAL 2016 is going to be held. For the occasion, Mr. Takahashi decided to make a signboard. He intended to write `CODEFESTIVAL2016` on it, but he mistakenly wrote a different string $S$. Fort","description_type":"Markdown"},"platform":"AtCoder","limit":{"time_limit":2000,"memory_limit":262144},"difficulty":"None","is_remote":true,"is_sync":true,"sync_url":null,"sign":"codefestival_2016_qualB_a"},"statements":[{"statement_type":"Markdown","content":"CODE FESTIVAL 2016 is going to be held. For the occasion, Mr. Takahashi decided to make a signboard.\nHe intended to write `CODEFESTIVAL2016` on it, but he mistakenly wrote a different string $S$. Fortunately, the string he wrote was the correct length.\nSo Mr. Takahashi decided to perform an operation that replaces a certain character with another in the minimum number of iterations, changing the string to `CODEFESTIVAL2016`.\nFind the minimum number of iterations for the rewrite operation.\n\n## Constraints\n\n*   $S$ is $16$ characters long.\n*   $S$ consists of uppercase and lowercase alphabet letters and numerals.\n\n## Input\n\nInputs are provided from Standard Input in the following form.\n\n$S$\n\n[samples]","is_translate":false,"language":"English"}],"meta":{"iden":"codefestival_2016_qualB_a","tags":[],"sample_group":[["C0DEFESTIVAL2O16","2\n\nThe second character `0` must be changed to `O` and the $14$th character `O` changed to `0`."],["FESTIVAL2016CODE","16"]],"created_at":"2026-03-03 11:01:14"}}