junk.sh

#! /bin/bash
m=`cat /tmp/file.csv|cut -d "," -f2`;
for m in `echo "$m"`;do
    data=`cat /tmp/file.csv|grep "$m"`;
    no=`echo $data|cut -d "," -f1`;
    ma=`echo $data|cut -d "," -f2`;
    gr=`echo $data|cut -d "," -f3`;
    ca=`echo $data|cut -d "," -f4`;
    tmp=`echo $gr|grep -Eio "[0-9]*$"`;
    if [[ "$tmp" < 20 ]];then
        tu="M";
    else
        tu="V";
    fi
    echo "$ma,$ca,$gr,$tu,$no";
done