command(words, playerid, params[])
{
    if(IsPlayerConnected(playerid))
    {
        new string[128], word[2][32];
        if(sscanf(params, "s[32]s[32]", word[0], word[1])) return SendClientMessage(playerid, -1, "Usage: /words <word1> <word2>");
        if(!strlen(word[0]) || !strlen(word[1])) return SendClientMessage(playerid, -1, "No words typed!");
        
        format(string, sizeof(string), "Your words are: %s and %s.", word[0], word[1]);
        SendClientMessage(playerid, -1, string);
    }
    return 1;
}

CMD:test(playerid, params[])
{
    new
        str01[32],
        str02[32];

    if(!sscanf(params, "s[32]s[32]", str01, str02))
    {
        //Your code
    }
    else
    {
        SendClientMessage(playerid, -1, "Usage: /test <string1> <string2>");
    }
    return 1;
}