extern crate rand;
extern crate ansi_term;

use std::io;
use std::io::prelude::*;
use std::f32::consts::PI;

use rand::{thread_rng, Rng};
use ansi_term::Colour::RGB;

fn main() {
    let mut s = 1.0; // thread_rng().gen_range(0.0, 256.0);

    let stdin = io::stdin();

    for line in stdin.lock().lines() {
        s += 1.0;

        let mut d = 0;

        for c in line.unwrap().chars() {
            d += match c {
                '\t' => 8,
                _ => 1
            };

            let (red, green, blue) = rainbow(0.1, (s + d as f32) / 3.0);

            print!("{}", RGB(red, green, blue).paint(c.to_string()));
        }

        print!("\n");
    }
}

fn rainbow(frec: f32, i: f32) -> (u8, u8, u8) {
    let red = (f32::sin(frec * i) * 127.0 + 128.0) as u8;
    let green = (f32::sin(frec * i + 2.0 * PI / 3.0) * 127.0 + 128.0) as u8;
    let blue = (f32::sin(frec * i + 4.0 * PI / 3.0) * 127.0 + 128.0) as u8;

    (red, green, blue)
}