__author__ = 'xiaolin'
print "hello world"
print "this is a test message"
name=raw_input('please input your name:')
print 'hello',name #pay attention to the dot:
print 100+200
print '100+200=',100+200
#below are the ifelse part
a=raw_input('please input a:')
if a > 1000:
    print a
else:
    if a>50:
        print 'a invovled in 50-100'
    else:
        print 'a invovled in 0-50'


print 10/3
print 10%3
s='SB'
print s*3