varPassed=$1

month=1
flag=0

theYear=`echo $varPassed | awk '{print substr ($0, 1, 4)'}`
dayOfYear=`echo $varPassed | awk '{print substr ($0, 5, 3)'}`
dayOfYear=`expr $dayOfYear - 0`

TestLeapYear() {
  if [[ `expr $theYear % 4` != 0 && $dayOfYear -gt 28 ]] then
    month=`expr $month + 1`
    dayOfYear=`expr $dayOfYear - 28`
  else
    if [[ `expr $theYear % 4` = 0 && $dayOfYear -gt 29 ]] then
      month=`expr $month + 1`
      dayOfYear=`expr $dayOfYear - 29`
    else
      flag=1
    fi
  fi
}

Days30() {
  if [[ $dayOfYear -gt 30 ]] then
    month=`expr $month + 1`
    dayOfYear=`expr $dayOfYear - 30`
  else
    flag=1
  fi
}

Days31() {
  if [[ $dayOfYear -gt 31 ]] then
    month=`expr $month + 1`
    dayOfYear=`expr $dayOfYear - 31`
  else
    flag=1
  fi
}

Days31 #january
if [[ $flag = 0 ]] then
  TestLeapYear #february
fi
if [[ $flag = 0 ]] then
  Days31 #march
fi
if [[ $flag = 0 ]] then
  Days30 #april
fi
if [[ $flag = 0 ]] then
  Days31 #may
fi
if [[ $flag = 0 ]] then
  Days30 #june
fi
if [[ $flag = 0 ]] then
  Days31 #july
fi
if [[ $flag = 0 ]] then
  Days31 #august
fi
if [[ $flag = 0 ]] then
  Days30 #september
fi
if [[ $flag = 0 ]] then
  Days31 #october
fi
if [[ $flag = 0 ]] then
  Days30 #november
fi

if [[ $month -lt 10 ]] then
  month=0$month
fi
if [[ $dayOfYear -lt 10 ]] then
  dayOfYear=0$dayOfYear
fi

echo $theYear$month$dayOfYear