#include <iostream>
using namespace std;
int main() {
char ch;
int pos = 0;
int a, b, c;
while(cin >> ch) {
int varno = ((pos % 8) + 1) / 2;
int value = ch - '0';
if (((pos % 8) & 1) && (varno < 4)) {
switch(varno) {
case 1: a = value; break;
case 2: b = value; break;
case 3: {
c = value;
cout << "a: " << a << ", b: " << b << ", c: " << c << "\n";
break;
}
}
}
pos++;
}
return 0;
}
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