#testmode:repl

s = "Glasflügel"
l = ,
for i in range(s.len) { l.push(s[i] + i) }
"".join(l)
"|".join(l)

#---

#"G0l1a2s3f4l5ü6g7e8l9"
#"G0|l1|a2|s3|f4|l5|ü6|g7|e8|l9"