d4 = {2:'two',3:'three',1:'one',22:'ventidue'}
# print d4[2]
#
# print type(d4.keys())

# for i in d4.keys():
#     if d4[i]=='two':
#         print "ciao"
#
#
# l = d4.keys()  #l = list(d4.keys())  in py3
# t = l
# t1=l[:]
# print l,t
#
# t.sort(reverse=True)
# print l , t, t1
#
# # ss = sorted(l)   # alternativa al list.sort()
# # print ss , l


# a = raw_input("ins: ")
# try:
#     f= int(a)
#     print f
# except:
#     print "stai attento!!"

#
# s = 'ciao a tutti'
# print s.join("1234")
#
# print "11".join("ciao a tutti voi")
# print "11".join(['a','b'])


#print  "1111".join(['aa','bb','cc'])


# s="Ciao a tutti ecco una frase"
# l = s.split()
# l1 =[]
#
# # for i in l:
# #     print i
# #     l1.append(i+' ')
# # print l,l1
#
# s1 = " ,".join(l)
# print s1