 Newell and Simon tried to capture a general version of this algorithm in a program called the " General <unk> <unk> " . Other " searching " programs were able to accomplish impressive tasks like solving problems in geometry and algebra , such as Herbert <unk> 's <unk> <unk> <unk> ( 1958 ) and <unk> , written by Minsky 's student James <unk> ( 1961 ) . Other programs searched through goals and <unk> to plan actions , like the <unk> system developed at Stanford to control the behavior of their robot Shakey . 
