#include<bits/stdc++.h>
#ifdef ONLINE_JUDGE
	#define getchar()(p1==p2&&(p2=(p1=buf)+fread(buf,1,1<<21,stdin),p1==p2)?EOF:*p1++)
	char buf[1<<21],*p1=buf,*p2=buf;
#endif
using namespace std;int read(){int num=0,f=1;char c;while(!isdigit(c=getchar()))if(c=='-')f=-1;while(isdigit(c))num=num*10+(c&15),c=getchar();return num*f;}void write(int x,char ch=' '){int F[20],cnt=0;if(!x)putchar('0');if(x<0)putchar('-'),x=-x;while(x)F[cnt++]=x%10+'0',x/=10;while(cnt)putchar(F[--cnt]);putchar(ch);}
namespace Main
{
    vector<pair<int,int>>ans;mt19937 rnd(2133);pair<int,int>a[4];void op(int x,int y){/*printf("#%d %d\n",x,y),*/ans.push_back(make_pair(a[x].second,a[y].second)),a[x].first-=a[y].first,a[y].first<<=1;}bool ck(){return a[0].first&&a[1].first&&a[2].first;}
    void OP(int x,int y){a[x].first>=a[y].first?op(x,y):op(y,x);/*for(int i=0;i<3;++i)printf("%d%c",a[i].first," \n"[i==2]);*/}/*void op1(){if(a[1].first>=a[0].first)op(y,x),ans.push_back(make_pair(2,1));}*/void srt(){sort(a,a+3);}void output(){write((int)ans.size(),'\n');for(auto i:ans)write(i.first),write(i.second,'\n');}
    void calc(){for(int i=rnd()%(a[2].first<=100?2:6);i--&&ck();)OP(1,2);if(!ck())output(),exit(0);srt();int x;for(;(x=a[1].first/a[0].first)>0;)if(x&1)OP(1,0);else OP(2,0);}
    void main(){for(int i=0;i<3;++i)a[i].first=read(),a[i].second=i+1;srt();for(;ck();){if(a[1].first==a[2].first)return OP(1,2),output();if(a[0].first==a[1].first)return OP(0,1),output();calc(),srt();}output();}
};
int main()
{
    const bool base=0,IO=1;int T;if(!base)T=1;else if(IO)T=read();else ios::sync_with_stdio(0),cin>>T;for(;T--;)Main::main();
    return 0;
}//Random Faster!