Update day1:change_occurrence_of_letter.py

day1:change_occurrence_of_letter.py

-a='restart'
-b=list(a)
-c=len(b)
-i=0
-while (i<c-1):
-    j=i+1
-    while (j<c-1):
-        if b[i]==b[j])
-            b.remove(a[j])
-            b.insert(j,"$")
-        j=j+1
-"".joina()
-print a
-#output:resta$t
\ No newline at end of file
+a=raw_input("enter a string")
+b=a.replace(a[0],'$')
+c=b.replace(b[0],a[0],1)
+print c
+"""output:
+enter a string restart
+resta$t
\ No newline at end of file