How to redirect http://ift.tt/2mqcxAm to http://ift.tt/2llqx9J in blogger

I have set custom domain on my blogger account bow I need to change my blog domain again without losing seo. How can I redirect my http://ift.tt/2mqcxAm to http://ift.tt/2llqx9J. I can redirect my oldblog.com to newblog.com but can't redirect post URLs like http://ift.tt/2mqcxAm to http://ift.tt/2llqx9J. please help I stuck here