#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")

#define rd_skip() while(*rp++>=48)
#define rd() ({long _v=0,_c;while(_c=*rp++-48,_c>=0)_v=_v*10+_c;_v;})
#define rep(v,e) for(long v=0;v<e;++v)
#define MD 998244353

typedef unsigned long ulong;
char wbuf[1<<25];

unsigned wd[10000];
void mkwd(){
	unsigned v='0000';
	long i=0;
	rep(a,10){
		rep(b,10){
			rep(c,10){
				rep(d,10){
					wd[i++]=v;
					v+=1<<24;
				}
				v+=(1<<16)-(10<<24);
			}
			v+=(1<<8)-(10<<16);
		}
		v+=(1<<0)-(10<<8);
	}
}

int main(){
	mkwd();
	char*mmap();
	char*rp=mmap(0l,1l<<25,1,2,0,0ll);
	char*wp=wbuf;
	rd_skip();
	while(*rp){
		ulong n=rd();
		ulong x=rd();
		ulong z=n+1;
		if(!(x&1)){
			z+=(n+3)/(x+3);
		}
		z>>=1;
		unsigned y=z%MD;
		if(y>=100000000){
			*wp++='0'+y/100000000;
			y%=100000000;
			*(int*)wp=wd[y/10000];
			wp+=4;
			*(int*)wp=wd[y%10000];
			wp+=4;
		}else if(y>=10000){
			unsigned q=y/10000; y%=10000;
			if(q>=1000) *wp++='0'+q/1000;
			if(q>=100)  *wp++='0'+q/100%10;
			if(q>=10)   *wp++='0'+q/10%10;
			*wp++='0'+q%10;
			*(int*)wp=wd[y];
			wp+=4;
		}else{
			if(y>=1000) *wp++='0'+y/1000;
			if(y>=100)  *wp++='0'+y/100%10;
			if(y>=10)   *wp++='0'+y/10%10;
			*wp++='0'+y%10;
		}
		*wp++='\n';
	}
	write(1,wbuf,wp-wbuf);
	_exit(0);
}