hex-tobase64-chall-1.py

dict={'0':'A','1':'B','2':'C','3':'D','4':'E','5':'F','6':'G','7':'H','8':'I','9':'J','10':'K','11':'L','12':'M','13':'N','14':'O','15':'P','16':'Q','17':'R','18':'S',
		'19':'T','20':'U','21':'V','22':'W','23':'X','24':'Y','25':'Z','26':'a','27':'b','28':'c','29':'d','30':'e','31':'f','32':'g','33':'h','34':'i','35':'j','36':'k',
		'37':'l','38':'m','39':'n','40':'o','41':'p','42':'q','43':'r','44':'s','45':'t','46':'u','47':'v','48':'w','49':'x','50':'y','51':'z','52':'0','53':'1','54':'2',
		'55':'3','56':'4','57':'5','58':'6','59':'7','60':'8','61':'9','62':'+','63':'/'}
		
a=raw_input()
b=d=c=""

for i in range(len(a)):
	b+=''.join(bin(int(a[i],16))[2:].zfill(4))				#ensuring that the conversion of the number is of 4 bits
	if(len(b)==12):														
		for k in range(len(b)):						#use of slice?
			c+=''.join(b[k])					#making another string so as to convert to index value
			if(len(c)==6):
				if(c.count('0')==6):
					d+='='
				else:
					q=int(c,2)
					d+=dict[str(q)]
					


			        c=""
		b=""

print(d)