{"trustable":false,"sections":[{"title":"","value":{"format":"HTML","content":"有n个学生打羽毛球，其中有a个人没拍没球，b个人只有拍，c个人只有球，d个人有拍有球。 \n现在要求选出几个人组织一场比赛，一共有2^n种情况，组织成功的条件是至少有2个拍1个球。求有多少种情况无法组织成功。"}},{"title":"Input","value":{"format":"HTML","content":"The first line contains a single number $t(1 \\leq t \\leq 10^3)$, the number of testcases. \n\u003cbr\u003e \n\u003cbr\u003eFor each testcase, the first line contains four integers $a,b,c,d(0 \\leq a,b,c,d \\leq 10^7,a+b+c+d \\geq 1)$."}},{"title":"Output","value":{"format":"HTML","content":"For each testcase, output a single line with a single integer, the answer modulo $998244353$."}},{"title":"Sample Input","value":{"format":"HTML","content":"\u003cpre\u003e3\n1 1 1 1\n2 2 2 2\n3 4 5 6\u003c/pre\u003e"}},{"title":"Sample Output","value":{"format":"HTML","content":"\u003cpre\u003e12\n84\n2904\u003c/pre\u003e"}}]}