There are several possible compounds that fit that limited description. The most common would be SCl2, SCl4 or SCl6, named sulfur dichloride, sulfur tetrachloride, or sulfur hexachloride, respectively.
One of the most common is SCl2 and its cousin S2Cl2.
SCl2(g) + H2O(l) --> HClS(aq) + HClO(aq)
S2Cl2(l) + 2H2O(l) --> H2S(g) + SO2(g) + 2HCl(aq)
============= Follow up ==============
The answer that Funny gave is a bit "funny". It is not balanced. You would need to put a 14 in front of HCl to balance the hydrogen atoms, but the oxygen atoms are not balanced A reaction that cannot be balanced is a sure indicator that the formula are not correct.
7 SCl2 + 7 H2O --> 7 SO2 + 14 HCl
It's also funny because in the equation the sulfur is being oxidized from +2 in SCl2 to +4 in SO2. The catch is that nothing is being reduced. You can't have oxidation without reduction, i.e. a redox reaction. Therefore, the reaction given by Funny cannot happen.
Funny could have said that the reaction is
SCl2 + H2O --> SO + 2HCl
The catch here is that sulfur monoxide is an unstable molecule that is found only in the gas phase.
If SO where to form it might immediately react with water to form H2S and H2SO4
2SO + 2H2O --> H2S + H2SO4
So you could predict the following, despite that it does not actually occur.
2SCl2 + 4H2O --> 4HCl + H2S + H2SO4