{"a":1,"b":2}
{"a":1,"b":5}
{"a":1,"b":6}
{"a":2,"b":3}
{"a":2,"b":7}
{"a":3,"b":4}
{"a":3,"b":8}
{"a":4,"b":9}
{"a":4,"b":5}
{"a":5,"b":10}
{"a":6,"b":9}
{"a":6,"b":8}
{"a":7,"b":9}
{"a":7,"b":10}
{"a":8,"b":10}