# This program plays with strings and their behaviors.

def main():
    print "Hello! \n This program plays with strings and their behaviors."

    string=raw_input("Please, input any sentence and press Enter:")

    #print "What would you like to
    print "counting the number of occurences of letter 'a' in it:",
    print string.count('a')

    print "Let's calculate the length of the sentense:",
    print len(string)

    print "Let's make all letters upper case:"
    print string.upper()
    print string

    print "Let's compose a new string:"
    position= string.find(' ')
    str2=string[:position]
    pos2=string.find(' ',position+1)
    str3=string[position+1:pos2]
    print str2 + " ho-ho-ho " + str3

    print "and finally let\'s generate 3 copies of our original string:"
    print string * 3

main()