# Remove special characters from String 
 
str=input("Enter the String:")
str2 = []
i = 0
while i < len(str):
    ch = str[i]
    if (ch>='a' and ch <= 'z') or  (ch >= 'A' and ch<= 'Z') or (ch >= '0' and ch <= '9') or (ch == '\0'):
        str2.append(ch)
    i += 1
Final_String = ''.join(str2)
print("After removing special character letter string is:",Final_String)