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uninstallB group exploit remove_all_B(b)=
preconditions:
quality:b,B_is_installed=true;
postconditions:
update quality:b,B_is_installed=false;
.
uninstallC group exploit remove_all_C(c)=
preconditions:
quality:c,C_is_installed=true;
postconditions:
update quality:c,C_is_installed=false;
.