//Do not declare variable marks.
//Write your code below this line.

function printer(inp_mark){
    
    var val = '';
    if (inp_mark > 90){
        val = 'AA';
    } else if (inp_mark 80 > && inp_mark <= 90){
        val = 'AB';
    }else if (inp_mark > 70 && inp_mark <= 80){
        val = 'BB';
    }else if (inp_mark > 60 && inp_mark <= 70){
        val = 'BC';
     }else if (inp_mark > 50 && inp_mark <= 60){
        val = 'CC';
     }else if (inp_mark >40 && inp_mark <= 50){
        val = 'CD';
     }else if (inp_mark >30 && inp_mark <=40 ){
        val = 'DD';
    }else if (inp_mark <=30){
        val = 'FF';
    }
    



}