#!/usr/bin/awk -f
BEGIN { LINELEN = 64 }
{
	s[++i] = $0;
	n = length($0);
	maxlen = n > maxlen ? n : maxlen;
}
END {
	for (i = 1; i <= maxlen; i += LINELEN)
		for (j = 1; j <= NR; j++) {
			pref = i == 1 ? "" : ":";
			suff = maxlen - i <= LINELEN ? "" : ":";
			print pref substr(s[j], i, LINELEN) suff;
		}
}