#pragma GCC optimize("Ofast")

#define rd_skip_line() while(*rp++!=10)
#define wt(v) {ulong _z=v;do*--wp=_z%10+48;while(_z/=10);}

typedef unsigned long ulong;

#define MD 998244353

ulong f1(){
	char*mmap();
	char*rp=mmap(0l,1l<<25,1,2,0,0ll);
	rd_skip_line();
	ulong z=0;
	ulong a0=0,a1=0,a2=0;
	for(ulong c;c=*rp++,c>='0';){
		++a0;
		if(c=='?'){
			ulong s=(a0+a1+a2)*3%MD;
			a0+=s;
			a1+=s;
			a2+=s;
		}else{
			ulong m=1<<(c&15);
			if((1<<1|1<<4|1<<7)&m){
				ulong t=a0;
				a0=a2;
				a2=a1;
				a1=t;
			}
			else if((1<<2|1<<5|1<<8)&m){
				ulong t=a0;
				a0=a1;
				a1=a2;
				a2=t;
			}
		}
		z+=a0;
	}
	return z%MD;
}

void f2(ulong z){
	char wbuf[64],*wp=wbuf+sizeof wbuf;
	wt(z);
	write(1,wp,wbuf+sizeof wbuf-wp);
}

int main(){
	f2(f1());
	_exit(0);
}