4.bf

>>>>>+[->>++>+>+++++++[<++++>>++<-]++>>+>+>+++++[>++>++++++<<-]+>>>,<++[[>[->>
]<[>>]<<-]<[<]<+>>[>]>[<+>-[[<+>-]>]<[[[-]<]++<-[<+++++++++>[<->-]>>]>>]]<<]>[
-]+<<[--[[-]>>->+<<<]>>[-<<<<[>+<-]>>>>>>+<]<<]>>[-]<<>>>[<<<+>>>-]<<<]>>>+<<<
<[<<]>>[[<+>>+<-]+<-[-[-[-[-[-[-[->->>[>>]>>[>>]<+<[<<]<<[<<]<]>[->>[>>]>>[>>]
<,<[<<]<<[<<]]<]>[->>[>>]>>[>>]<-<[<<]<<[<<]]<]>[->>[>>]>>[>>]<.<[<<]<<[<<]]<]
>[->>[>>]>>[>>]<<-<<[<<]<<[<<]]<]>[->>[>>]>>[>>]+[<<]<<[<<]]<]>[->>[>>]>>[>>]<
[>+>>+<<<-]>[<+>-]>>[<<+>>[-]]+<<[>>-<<-]>>[<<+>>>>+<<-]>>[<<+>>-]<<[>>+<<-]+>
>[<<->>-]<<<<[-<<[<<]<<[<<]<<<<<++>>]>>[-<<<<<<[<<]<<[<<]<]>]<]>[->>[>>]>>[>>]
<[>+>>+<<<-]>[[<+>-]>>[-]+<<]>>[<<+>>>>+<<-]>>[<<+>>-]<<[>>+<<-]+>>[<<->>-]<<<
<[-<<[<<]<<[<<]<<<<<+>>]>>[-<<<<<<[<<]<<[<<]<]>]>[<+>-]<<<<<<[>>+<<-[->>->>+[>
>>[-<+>>+<]+<-[-[[-]>[-]<]>[-1<<<+>>>]<]>[-<<<->>>]>[-<+>]<<<<[>>+<<-]>>]<<<<<
<]>>[-<<+[>>>[-<+>>+<]+<-[-[[-]>[-]<]>[-1<<<->>>]<]>[-<<<+>>>]>[-<+>]<<<<[<<+>
>-]<<]]]>>>>>>>]