def lower_ctr(str):
      
      lower_ctr= 0
      for i in range(len(str)):
          if str[i] >= 'a' and str[i] <= 'z': lower_ctr += 1     
      return  lower_ctr
def lower_ctr(str):
    lower_ctr = 0
   
    for T in range(len(str)):
        if str[T] >= "a" and str[T] <= "z":
            lower_ctr += 1
    return lower_ctr