***
* memory layout : BIT
* B: character code for B and F
* I: input
* T: temporary
***
** make B(66) **
I++++++[-<B+++++++++++>I]
** convert numeric chracter to integer **
I,>T++++++[-<I-------->T]<I
** loop **
I[-<B.++++.---->I]
KioqCiogbWVtb3J5IGxheW91dCA6IEJJVAoqICBCOiBjaGFyYWN0ZXIgY29kZSBmb3IgQiBhbmQgRgoqICBJOiBpbnB1dAoqICBUOiB0ZW1wb3JhcnkKKioqCioqIG1ha2UgQig2NikgKioKSSsrKysrK1stPEIrKysrKysrKysrKz5JXQoqKiBjb252ZXJ0IG51bWVyaWMgY2hyYWN0ZXIgdG8gaW50ZWdlciAqKgpJLD5UKysrKysrWy08SS0tLS0tLS0tPlRdPEkKKiogbG9vcCAqKgpJWy08Qi4rKysrLi0tLS0+SV0K