# coding:utf-8
print 'hello world';
a = raw_input();#输入一个数
b = raw_input();
print a;

str = 'caihanfei';
min = 60;
hour = 12;
day = 7;
daymins = 7*(12*60);
print daymins;
print str;
print str[0];
print str[1:6];#1~5
print a+b;
print id(a);#获取地址
print type(a);

# 乘方运算符
a = 5;
a = 5**2;
print a;
