What is the full meaning of these 1 icpc?

What is the full meaning of these and its function 1 c b n 2 s e c 3 n d i c 4 e f c c 5 i c p c or:What is the full meaning of these and its function

What is the full meaning of these and its function 1 c b n 2 s e c 3 n d i c 4 e f c c 5 i c p c

or:What is the full meaning of these and its function 1 c b n 2 s e c 3 n d i c 4 e f c c 5 i c p c

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