Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Name | Type | R.A. (J2000) | Dec. (J2000) | Redshift (km/s) | Apparent Magnitude |
| --- | --- | --- | --- | --- | --- |
| IC 2049 | SAB(s)d? | 04h 12m 04.3s | −58° 33′ 25″ | 1469 ± 7 | 14.5 |
| NGC 1536 | SB(s)c pec | 04h 10m 59.8s | −56° 28′ 50″ | 1217 ± 13 | 13.2 |
| NGC 1543 | (R)SB(l)00 | 04h 12m 43.2s | −57° 44′ 17″ | 1176 ± 7 | 11.5 |
| LSBG F157-081 | Irregular | 04h 27m 13.7s | −57° 25′ 42″ | 1215 ± 7 | 16.7 |
| NGC 1533 | (L)SB(rs)00 | 04h 09m 51.8s | −56° 07′ 06″ | 790 ± 5 | 11.7 |
| IC 2038 | Sd pec | 04h 08m 53.7s | −55° 59′ 22″ | 712 ± 52 | 15.5 |
| APMBGC 157+016+068 | Irregular | 04h 22m 51.7s | −56° 13′ 39″ | 1350 ± 4 | 16.3 |
| NGC 1546 | SA0+? | 04h 14m 36.5s | −56° 03′ 39″ | 1284 ± 14 | 11.8 |
| IC 2058 | Sc | 04h 17m 54.3s | −55° 55′ 58″ | 1379 ± 1 | 13.9 |
| IC 2032 | IAB(s)m pec | 04h 07m 03.0s | −55° 19′ 26″ | 1068 ± 7 | 14.7 |
| NGC 1566 | (R'_1)SAB(rs)bcSy1 | 04h 20m 00.4s | −54° 56′ 16″ | 1504 ± 2 | 10.3 |
| NGC 1596 | SA0: sp | 04h 27m 38.1s | −55° 01′ 40″ | 1510 ± 8 | 12.1 |
| NGC 1602 | IB(s)m pec | 04h 27m 55.0s | −55° 03′ 28″ | 1568 ± 8 | 13.3 |
| NGC 1515 | SAB(s)bc | 04h 04m 02.7s | −54° 06′ 00″ | 1175 ± 7 | 12.1 |
| NGC 1522 | (R')S00: pec | 04h 06m 07.9s | −52° 40′ 06″ | 898 ± 7 | 13.9 |
| ESO 118-019 | S00 pec | 04h 18m 59.5s | −58° 15′ 27″ | 1239 | 14.9 |
| ESO 157-030 | E4 | 04h 27m 32.6s | −54° 11′ 48″ | 1471 ± 28 | 14.7 |
| ESO 157-047 | S0/a? pec sp | 04h 39m 19.1s | −54° 12′ 41″ | 1655 ± 10 | 15.5 |
| ESO 157-049 | S? | 04h 39m 36.9s | −53° 00′ 46″ | 1678 ± 5 | 14.3 |
| IC 2085 | S00 pec sp | 04h 31m 24.2s | −54° 25′ 01″ | 982 ± 10 | 13.9 |
| NGC 1549 | E0−1 | 04h 15m 45.1s | −55° 35′ 32″ | 1220 ± 15 | 10.7 |
| NGC 1553 | SA(rl)00 | 04h 16m 10.5s | −55° 46′ 49″ | 1080 ± 11 | 10.3 |
| NGC 1574 | SA0- | 04h 21m 58.8s | −56° 58′ 29″ | 1050 ± 25 | 11.4 |
| NGC 1581 | S0- | 04h 24m 44.9s | −54° 56′ 31″ | 1600 ± 27 | 13.6 |
| NGC 1617 | (R')SAB(rs)a | 04h 31m 39.5s | −54° 36′ 08″ | 1063 ± 21 | 11.4 |
| Abell 3202 | Irregular | 04h 01m 15.2s | −53° 29′ 23″ | 1135 ± 40 | 16.9 |
Question:
what number of "irregular" types are there?
Answer:
3