#!/bin/bash
# your code goes here
grep -nP "Mar\s31\s[\d:]+\s2015"
IyEvYmluL2Jhc2gKIyB5b3VyIGNvZGUgZ29lcyBoZXJlCmdyZXAgLW5QICJNYXJcczMxXHNbXGQ6XStcczIwMTUi
VHVlIE1hciAzMCAwMDowMToxMCAyMDE1ClR1ZSBNYXIgMzEgMDA6MDE6MjAgMjAxNSxNYXIgMzEgMDA6MDI6NDMgMjAxNQpUdWUgQXByIDAxIDAwOjAxOjE1IDIwMTU=
Tue Mar 30 00:01:10 2015
Tue Mar 31 00:01:20 2015,Mar 31 00:02:43 2015
Tue Apr 01 00:01:15 2015