Loop to find the ways for every possible sequence
while exp_c2 >= c2 : NEW_LINE INDENT f1 = math . factorial ( l ) NEW_LINE f2 = math . factorial ( c1 ) NEW_LINE f3 = math . factorial ( c2 ) NEW_LINE s += f1 // ( f2 * f3 ) NEW_LINE c2 += 1 NEW_LINE c1 -= 2 NEW_LINE l -= 1 NEW_LINE DEDENT return s NEW_LINE