a) 231, 234, 237
b) 2010, 2313, 2616, 2919
c)4002, 4332, 4662, 4992
d) 3021, 3024, 3027, 3120, 3123, 3126, 3129, 3222, 3225, 3228, 3321, 3324, 3327, 3420, 3423, 3426, 3429, 3522, 3525, 3528, 3621, 3624, 3627, 3720, 3723, 3726, 3729, 3822, 3825, 3828, 3921, 3924, 3927
