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¤%=~...... gull call. . . . ......~=%¤
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=~........ world-builder's shortcut, to define a ........~=
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¤%=~...... place a flock of birds at the edge and ......~=%¤
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##¤%=~.... entire volume ....~=%¤##
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####¤%=~.. a seagull can be defined by as little ..~=%¤####
###¤%=~... as five vertices; six triangles. (i ...~=%¤###
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