cat $* | 
nawk '
    BEGIN {
	text=""
	image=""
    }

    /IMAGE:/ {
	if (!printed) {
	    printed++
	    print name
	}
	print $0
	next
    }

    /TEXT:/ {
	if (!printed) {
	    printed++
	    print name
	}
	print $0
	next
    }

    /^N:/ {
	if (printed) {
	    print ""
	    printed = 0
	}
	name=$0
	next
    }

    // {
	next
    }

' | tr "A-Z" "a-z"