Shell Programming and Scripting

83 2 
86 3 
90 2
94  2 
107 2
110  2

86 3 
90 2

83 2
86 3

[/tmp] cat x.awk
{
   lines[NR]=$0;
   matches[NR]=$2$3$4;
}
END {
   i=1;
   while (i <= NR) {
      found=0;
      check=i;
      while (matches[check]==matches[++i]) {
         found=1;
      }
      if (! found) {
         print lines[check];
      }
   }
}
[/tmp] cat x.txt
5 bla bla  1
5 bla bla  1
9 bla bla 3
78 bla bla 1
83 bla bla 2
83 bla bla 2
130 bla bla 1
83 bla bla 2
187 bla bla 0
188 bla bla 0
189 bla bla 3
190 bla bla 3
[/tmp] awk -f x.awk x.txt
9 bla bla 3
78 bla bla 1
130 bla bla 1
83 bla bla 2

awk 'BEGIN{c=1;}{if(!a[$2$3$4]){a[$2$3$4]=$0;b[c]=$0;c++  ;}}END{for(i=1;i<c;i+  ){print b[i];}}' file

1 bla bla 0
6 bla bla 2
10 bla bla 3
15 bla bla 3
71 bla bla 3
75 bla bla 3
79 bla bla 1
83 bla bla 2
86 bla bla 3
90 bla bla 2
95 bla bla 2
107 bla bla 2
110 bla bla 2
135 bla bla 1
187 bla bla 0

1 bla bla 0
6 bla bla 2
187 bla bla 0

79 bla bla 1
83 bla bla 1
135 bla bla 1
187 bla bla 0

awk '{$1=$1} m==$2 FS $3 FS $4{p=x;next}p{print p};{p=$0;m=$2 FS $3 FS $4}END{if(p)print p}' infile

1 bla bla 0
6 bla bla 2
79 bla bla 1
83 bla bla 2
86 bla bla 3
135 bla bla 1
187 bla bla 0