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Background

土拨鼠乐乐正在参加编程学习.

Description

她总共学习了"顺序结构","条件结构","循环结构"三门课程, 现在她想知道, 如果恰好有一门课不及格的话, 她就可以接口学编程偷偷玩游戏了.

Format

Input

输入三个整数, 表示三门课的成绩(成绩范围在0-100之间)

Output

如果恰好有一门课不及格(60分为及格), 则输出"gogogo", 否则输出"sad"

Samples

60 30 90

gogogo

70 80 90

sad

Limitation

1s, 1024KiB for each test case.