```go
package main

import (
	"bufio"
	"fmt"
	"os"
)

func main() {
	in := bufio.NewReader(os.Stdin)
	out := bufio.NewWriter(os.Stdout)
	defer out.Flush()

	var n int
	fmt.Fscan(in, &n)

	for i := 0; i < n; i++ {
		var s string
		fmt.Fscan(in, &s)

		sum := 0
		zeroCount := 0
		evenCount := 0

		for _, ch := range s {
			d := int(ch - '0')
			sum += d
			if d == 0 {
				zeroCount++
			}
			if d%2 == 0 {
				evenCount++
			}
		}

		if sum%3 == 0 && zeroCount >= 1 && evenCount >= 2 {
			fmt.Fprintln(out, "red")
		} else {
			fmt.Fprintln(out, "cyan")
		}
	}
}
```