/home/S1IRng/prog.fs(5,9): warning FS0058: Possible incorrect indentation: this token is offside of context started at position (4:12). Try indenting this token further or using standard formatting conventions.
/home/S1IRng/prog.fs(5,34): error FS0010: Unexpected symbol '[' in pattern. Expected identifier, '(', '(*)' or other token.
/home/S1IRng/prog.fs(5,48): error FS0010: Unexpected symbol '..' in pattern. Expected ']' or other token.