text = input() l_text = len( text ) flag = True if l_text < 1: print( "Invalid input" ) flag = False elif l_text == 1 : result = [ text, 1 ] flag = True else : result = [] cnt = 0 i = 0 j = 0 y = text[i] z = text[i+1:] print( y,z ) cnt += 1 if z[j] == y : cnt += 1 else : result.append(y) result.append(cnt) if len(z) < 1 : break elif len( z) == 1 : result.append(z) result.append(1) flag = True break if flag : for idx in result : print( f"{idx}",end='')