Question 2: That's odd!

The Problem

This is a little warmup problem to check that your account is set up correctly, that we can receive your solutions correctly, and that we can judge your solutions and record the results correctly.

No lunch until everything is correct.

The input consists of a sequence of text lines, each terminated with a newline character. Your program should count the number of lines containing an odd number of decimal digits. If the number of lines containing an odd number decimal digits is odd, your program should print a single output line consisting of the string `odd'. Otherwise, your program should print the string `sod'.

As with all questions, the input sequence is presented on the standard input stream (stdin); the output should be sent to the standard output stream (stdout).

Sample Input

967-1111
241-0-241
310-10-10

Sample Output

odd