#!/usr/bin/python3
def main():
          #containers
          tpl=(1,2,3,4)
          ml=[1,2,3,4]
          mdic={'key1':1,'key2':2}
          print(tpl[0])
          for el in tpl:
                   print(el)
          for i,el in enumerate(tpl):
                   print (f'[{i}]={el}')
          print (*tpl, sep=',')
          (a,b,_,_)=tpl
          print (f'{a},{b},{a},{b}')
          #tpl[0]=4 #Apagoreuetai
          for el in ml:
                   print(el)
          for i,el in enumerate(ml):
                   print (f'[{i}]={el}')
          print (*ml)
          ml[0]=3.4
          print (*ml)
          ml2=ml+ml
          print(*ml2)
          for key,value in mdic.items():
                   print (f'{key}={value}')
          for el in mdic.values():
                   print (el)
          for key in mdic:
                   print (key)
if __name__=="__main__":
          main()