var n = Int(readLine()!)!
var str = readLine()!
var s = ""
var t = ""
var toggle = false

for c in str {
    if c == " " {
        toggle = true
        continue
    }
    
    if toggle {
        t.append(c)
    }
    else {
        s.append(c)
    }
}

var ans = ""
for i in 1...n {
    ans.append(s[s.index(s.startIndex, offsetBy: i - 1)])
    ans.append(t[t.index(t.startIndex, offsetBy: i - 1)])
}
