#!/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,c,d)=tpl
        (a,b,_,_)=tpl
        #print (f'{a},{b},{c},{d}')
        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()