R version 2.13.0 (2011-04-13)
Copyright (C) 2011 The R Foundation for Statistical Computing
ISBN 3-900051-07-0
Platform: i486-pc-linux-gnu (32-bit)

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> x <- c(bachelor,law,master,geen,doctor,master,geen,bachelor,master,law,bachelor,doctor,bachelor,law,master,bachelor,geen,master,bachelor,doctor,master,geen,master,master,master)
Error: object 'bachelor' not found
Execution halted