#include<bits/stdc++.h>

using i64=long long;
using u64=unsigned long long;

// #define ONLINE_JUDGE
#define INPUT_DATA_TYPE int
#define OUTPUT_DATA_TYPE int
inline __attribute((always_inline)) INPUT_DATA_TYPE read(){register INPUT_DATA_TYPE x=0;register char f=0,c=getchar();while(c<'0'||'9'<c)f=(c=='-'),c=getchar();while('0'<=c&&c<='9')x=(x<<3)+(x<<1)+(c&15),c=getchar();return f?-x:x;}void print(OUTPUT_DATA_TYPE x){if(x<0)x=-x,putchar('-');if(x>9)print(x/10);putchar(x%10^48);return;}

struct NODE{
    i64 len;
    int val;
};

i64 c[10];
int to[279936][7],pw[7];

int add(int val,int k,u64 len){
    int left=len%6;
    len-=left;
    while(left--)
        val=(val*10+k)%7;
    val=(val+(len/6)*11111*k)%7;
    return val;
}

void solve(){
    register int i,val=0,vv,s=0;
    for(i=0;i<10;++i) c[i]=read();
    for(i=7;i<10;++i) c[i-7]+=c[i];

    std::vector<NODE> res,tmp;

    for(i=6;~i;--i){
        if(c[i]>5) val=add(val,i,c[i]-5),res.push_back({c[i]-5,i}),c[i]=5;
        s=s*6+c[i];
    }
    if(to[s][val]==-1) return puts("-1"),void();

    while(s){
        res.push_back({1,to[s][val]});
        std::tie(val,s)=std::make_tuple((val*10+to[s][val])%7,s-pw[to[s][val]]);
    }

    for(auto [len,k]:res){
        if(k<=2&&c[k+7]){
            if(len<=c[k+7]) c[k+7]-=len,tmp.push_back({len,k+7});
            else tmp.push_back({c[k+7],k+7}),tmp.push_back({len-c[k+7],k}),c[k+7]=0;
        }else tmp.push_back({len,k});
    }

    printf("%d\n",tmp.size());
    for(auto [len,val]:tmp) printf("%lld %d\n",len,val);
}

int main(){
	#ifndef ONLINE_JUDGE
	freopen("name.in", "r", stdin);
	freopen("name.out", "w", stdout);
	#endif

    memset(to,-1,sizeof(to));
    register int i=0,j,s,maxs=279936;

    to[0][0]=1;

    for(i=pw[0]=1;i<7;++i) pw[i]=pw[i-1]*6;

    for(s=1;s<maxs;++s){
        c[0]+=1;
        for(i=0;i<7;++i){
            if(c[i]==6) c[i+1]+=1,c[i]=0;
            if(c[i]) for(j=0;j<7;++j)if(to[s][j]==-1&&to[s-pw[i]][(j*10+i)%7]!=-1)
                to[s][j]=i;
        }
    }

    int T=read();
    while(T--) solve();

	#ifndef ONLINE_JUDGE
	fclose(stdin);
	fclose(stdout);
	#endif
    return 0;
}